SOLUTION: If a number is added to the numerator of 7/8 and the same number is subtracted from the denominator, the result is 4. Find the number.

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Question 837438: If a number is added to the numerator of 7/8 and the same number is subtracted from the denominator, the result is 4. Find the number.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
(7+x)/(8-x)=4
7+x=4*(8-x)
7+x=32-4x
5x=25
x=5
check
12/3=4
ok