Question

Ofelia has a certain amount of money. If she spends $12 , then she has 1/5 of the original amount left. How much money did Ofelia have originally?

Answer 1

$x-original\ amount\\\\x-12=\frac{1}{5}x\\\frac{5}{5}x-\frac{1}{5}x=12\\\frac{4}{5}x=12\ \ \ \ \ |\cdot\frac{5}{4}\\x=15\\\\She\ had\ \ 15\ originally$