#1372 · Algebra · Linear equations
Coins in a Pocket
In my pocket I have 27 coins, which are sovereigns (£1), half-crowns (£0.125 or 2s 6d), or shillings (£0.05 or 1s), and the amount I have is £5. 0s. 6d.; how many coins of each sort have I?
H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. X. Miscellaneous Equations, Examples X.d, No. 21
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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).