SOLUTION: One number is 12 more than another. the sum of the smaller number and twice the larger number is 39. Find the larger number.

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Question 122479: One number is 12 more than another. the sum of the smaller number and twice the larger number is 39. Find the larger number.
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
X=Y+12
X+2(X+12)=39
X+2X+24=39
3X=39-24
3X=15
X=15/3
X=5 THE SMALLER NUMBER.
5+12=17 FOR THE LARGER NUMBER.
PROOF
5+2*17=39
5+34=39
39=39