SOLUTION: ula is twelve and her grandfather is sixty. In how many years will her grandfather be three times as old as she will be at that time?

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Question 1130666: ula is twelve and her grandfather is sixty. In how many years will her grandfather be three times as old as she will be at that time?
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
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60+x = 3*(12+x)

60 + x = 36 + 3x

60-36 = 3x - x


2x = 24  ====>  x = 24/2 = 12.


Answer.  In 12 years.

Solved.