SOLUTION: Can you please give me the solution about this kind of problem: Jeff is 10 years old and his brother is 2 years old. In how many years will Jeff be twice as old as his brother?

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Question 930807: Can you please give me the solution about this kind of problem:
Jeff is 10 years old and his brother is 2 years old. In how many years will Jeff be twice as old as his brother?
i need the full solution on how to get he answer to this. Thanks! :)

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Every x years passing, Jeff is 10+x and brother is 2+x.
When x is 10%2Bx=2%282%2Bx%29?
BETTER SAID: What value for x makes 10%2Bx=2%282%2Bx%29 true?


10%2Bx=4%2B2x
highlight%286=x%29