SOLUTION: In four years Ben will be three times as old as he was 12 years ago. How old is he now?

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Question 613575: In four years Ben will be three times as old as he was 12 years ago. How old is he now?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
In four years Ben will be three times as old as he was 12 years ago. How old is he now?
**
let x=Ben's age now
x+4 =Ben's age in 4 years
x-12=Ben's age 12 years ago
..
x+4=3(x-12)
x+4=3x-36
2x=40
x=20
ans:
Ben's age now=20