| 104 | Three pairwise sums | Easy | Lemma | Adding equationsSymmetry | |
| 744 | Sum and difference | Easy | Lemma | Systems | |
| 745 | Substitute | Easy | Lemma | Systems | |
| 746 | Line meets parabola | Easy | Lemma | Systems | |
| 1303 | Nonlinear Simultaneous Equations | Easy | Hall & Knight | simultaneous equationssubstitution method | |
| 1304 | Simultaneous Equations with Quadratic | Easy | Hall & Knight | simultaneous equationssubstitution method | |
| 1318 | Reciprocal Fractions System | Easy | Hall & Knight | simultaneous equationsfractional equations | |
| 1319 | Sum of Cubes over Product System | Easy | Hall & Knight | simultaneous equationsalgebraic manipulation | |
| 1320 | Linear and Reciprocal Mixed System | Easy | Hall & Knight | simultaneous equationsreciprocal substitution | |
| 944 | Solving a mixed linear‑cubic system | Medium | Hall & Knight | linear equationscubic substitution | |
| 945 | Linear and cubic equations with a sum condition | Medium | Hall & Knight | substitutioncubic equation | |
| 946 | Quadratic‑type relations in three variables | Medium | Hall & Knight | eliminationlinear combination | |
| 947 | Quadratic forms with a linear constraint | Medium | Hall & Knight | quadratic eliminationlinear substitution | |
| 974 | Composition of Brass and Bronze | Medium | Hall & Knight | mixturesratios+1 | |
| 975 | Rowing Stream Times | Medium | Hall & Knight | word problemsspeed and distance+1 | |
| 994 | Pension Proportions and Service Lengths | Medium | Hall & Knight | VariationSimultaneous Equations | |
| 1305 | Homogeneous Quadratic System | Medium | Hall & Knight | simultaneous equationshomogeneous equations | |
| 1306 | Symmetric Quartic System | Medium | Hall & Knight | simultaneous equationsfactoring polynomials | |
| 1307 | System with Square Roots | Medium | Hall & Knight | simultaneous equationssubstitution | |
| 1308 | Symmetric Radical System | Medium | Hall & Knight | simultaneous equationssymmetric equations | |
| 1309 | Symmetric Radical System | Medium | Hall & Knight | systems of equationsradicals+1 | |
| 1310 | Homogeneous Quadratic System | Medium | Hall & Knight | systems of equationsquadratic equations | |
| 1311 | Simultaneous Quadratics | Medium | Hall & Knight | systems of equationsquadratic systems | |
| 1312 | Non-linear Equation System | Medium | Hall & Knight | systems of equationsquadratic equations | |
| 1313 | Quadratic Equations in Two Variables | Medium | Hall & Knight | systems of equationsquadratic systems | |
| 1315 | Symmetric Quartic System | Medium | Hall & Knight | simultaneous equationssymmetric polynomials+1 | |
| 1316 | Quartic Difference System | Medium | Hall & Knight | simultaneous equationschange of variables+1 | |
| 1317 | Quintic Difference System | Medium | Hall & Knight | simultaneous equationspolynomial factorization+1 | |
| 1321 | System with Cube Roots | Medium | Hall & Knight | simultaneous equationsradical equations | |
| 1323 | Square Roots and Negative Powers | Medium | Hall & Knight | simultaneous equationsnegative exponents | |
| 1324 | Radicals and Difference of Squares | Medium | Hall & Knight | radical equationssimultaneous equations | |
| 1326 | Reciprocal Square Roots | Medium | Hall & Knight | simultaneous equationsrational equations | |
| 1327 | System with square roots | Medium | Hall & Knight | simultaneous equationsradical equations | |
| 1328 | Quadratic and product system | Medium | Hall & Knight | simultaneous equationssubstitution | |
| 1330 | Linear and quadratic combination | Medium | Hall & Knight | simultaneous equationssubstitution | |
| 1333 | System of Homogeneous Quadratic Equations | Medium | Hall & Knight | simultaneous equationshomogeneous equations | |
| 1334 | Algebraic Fraction and Linear Equation System | Medium | Hall & Knight | simultaneous equationsalgebraic fractions | |
| 1342 | Homogeneous and Quadratic System | Medium | Hall & Knight | systems of equationshomogeneous equations+1 | |
| 1343 | Linear and Cubic System | Medium | Hall & Knight | systems of equationscubic equations+1 | |
| 1344 | Mixed Algebraic System | Medium | Hall & Knight | systems of equationsnonlinear systems | |
| 1345 | Linear and Quadratic Product System | Medium | Hall & Knight | systems of equationsquadratic systems | |
| 1347 | Three Symmetric Quadratic Equations | Medium | Hall & Knight | systems of equationssymmetric equations | |
| 1348 | Homogeneous and Linear Systems | Medium | Hall & Knight | simultaneous equationshomogeneous equations | |
| 1349 | Cyclic Product Equations | Medium | Hall & Knight | simultaneous equationsproduct of differences | |
| 1350 | Exponential Product System | Medium | Hall & Knight | simultaneous equationsproduct systems | |
| 1351 | Power Product System | Medium | Hall & Knight | simultaneous equationsexponents | |
| 1352 | Symmetric Product-Sum Equations | Medium | Hall & Knight | simultaneous equationsfactorisation | |
| 1353 | Bilinear Variable Systems | Medium | Hall & Knight | simultaneous equationsfactorisation | |
| 1354 | System of Three Variables | Medium | Hall & Knight | simultaneous equationssubstitution | |
| 1355 | Symmetric Cubic System | Medium | Hall & Knight | symmetric polynomialspower sums | |
| 1314 | Simultaneous Quadratic Equations | Deep | Hall & Knight | systems of equationsquadratic systems+1 | |
| 1322 | Fractional Exponent System | Deep | Hall & Knight | simultaneous equationsfractional exponents | |
| 1325 | Nested Radicals and Square Roots | Deep | Hall & Knight | radical equationssimultaneous equations | |
| 1329 | Homogeneous and product forms | Deep | Hall & Knight | simultaneous equationshomogeneous equations | |
| 1331 | Nonlinear system with complex roots | Deep | Hall & Knight | simultaneous equationscomplex roots | |
| 1332 | Difference of powers system | Deep | Hall & Knight | simultaneous equationsalgebraic manipulation | |
| 1335 | Cubic Homogeneous System | Deep | Hall & Knight | simultaneous equationshomogeneous equations | |
| 1336 | Cubic Equations with Constant Term | Deep | Hall & Knight | simultaneous equationshomogeneous systems | |
| 1337 | Nonlinear Symmetric System | Deep | Hall & Knight | simultaneous equationshigher degree equations | |
| 1338 | System of Quadratic Equations | Deep | Hall & Knight | systems of equationsquadratic equations | |
| 1339 | Nonlinear System with Products | Deep | Hall & Knight | systems of equationsnon-linear equations | |
| 1340 | Fractional Equations with Parameters | Deep | Hall & Knight | fractional equationsalgebraic manipulation | |
| 1341 | Homogeneous Cubic System | Deep | Hall & Knight | cubic equationshomogeneous equations | |
| 1346 | Symmetric Quadratic and Linear System | Deep | Hall & Knight | systems of equationsquadratic systems | |
| 1356 | Quadratic and Linear System with Parameter | Deep | Hall & Knight | homogeneous equationsquadratic systems | |
| 1357 | Complex Solutions for Three Variables | Deep | Hall & Knight | simultaneous equationscomplex roots | |
| 1902 | Symmetric Equal Products | Deep | Hall & Knight | systems of equationssymmetry | |
| 1903 | Real Triads of Solutions | Deep | Hall & Knight | linear systemsdeterminants+1 | |