Math
posted by Cheryl .
Mr.Wood went to the stores to buy school supplies for his children. He spent half of his money plus $5 at Store A. He then spent half of the remaining money plus $10 at Store B. At the end he had $25 left. How much money did Mr. Wood start with?

If he started with x, then after A he had
x/2  5 left. After B he had
(x/25)/210 left
So,
x  (x/2+5)  (x/25)/210 = 25
x = 150
after A = had 70
after B he had 25
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