SOLUTION: Devin is 51 years younger than Jamie. 7 years ago Jamie’s age was 4 times devins age. How old is devin now?

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Question 1165445: Devin is 51 years younger than Jamie. 7 years ago Jamie’s age was 4 times devins age. How old is devin now?
Found 2 solutions by ikleyn, hoomanc:
Answer by ikleyn(52788)   (Show Source):
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Let x be the Devin's age 7 tears ago. Then Jamie's age 7 years ago was 4x, according to the condition, and we are given additionally that 4x - x = 51. Hence, 3x = 51, x = 51/3 = 17. Thus 7 years ago Devin was 17 years old. ANSWER. Devin is 17+7 = 24 years old now.

Solved.

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There is a bunch of lessons on age word problems
    - Age problems and their solutions
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    - A fresh formulation of a traditional age problem
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Answer by hoomanc(14)   (Show Source):
You can put this solution on YOUR website!

D= Devon in 2020
,J= Jamie in 2020
(D-7)= Devon in 2016
(D-7)= Devon in 2016
D+51=J
4*(D-7)=(J-7)
Try to subtract the two side of above equation together to remove J from right side.
D+51-(4D-28)=J-(J-7)
-3D+79=7 >>> 72=3D >>> D=24
And from first equation we have >>> J=D+51 >>> J=75