MediumRational expressions

OpenStax, Elementary Algebra 2e §8.7 Solve Proportion and Similar Figure Applications · Exercise 63 · Algebra · Rational expressions

Solve Proportion and Similar Figure Applications · Exercise 63

Marisol solves the proportion $\frac{144}{a} = \frac{9}{4}$ by ‘cross multiplying’, so her first step looks like $4 \cdot 144 = 9 \cdot a .$ Explain how this differs from the method of solution shown in.

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OpenStax, Elementary Algebra 2e · §8.7 Solve Proportion and Similar Figure Applications · Exercise 63

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