Questions on Word Problems: Age answered by real tutors!

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Question 148568: A man is 30 years old and his son is 13 years old. In how many years will the son be 3/4s as old as his father?: A man is 30 years old and his son is 13 years old. In how many years will the son be 3/4s as old as his father?
Answer by mangopeeler07(429) About Me  (Show Source):
You can put this solution on YOUR website!
man=30
son=13
x=amount of years

13+x=(3/4)(30+x)

Distribute
13+x=22.5+3/4x

Subtract 13 from both sides
x=9.5+3/4x

Subtract 3/4x
1/4x=9.5

Multiply both sides by 4
x=38

38 years