SOLUTION: what number can be added to both the numerator and the denominator of 17/25 to form a fraction equal to 5/7?

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Question 229549: what number can be added to both the numerator and the denominator of 17/25 to form a fraction equal to 5/7?
Answer by Alan3354(69443) About Me  (Show Source):
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what number can be added to both the numerator and the denominator of 17/25 to form a fraction equal to 5/7?
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(17+n)/(25+n) = 5/7
Cross multiply
7(17+n) = 5(25+n)
119+7n = 125+5n
2n = 6
n = 3