Homework Help: math

Posted by Molly on Wednesday, January 23, 2013 at 10:53pm.

Find a fraction that reduces to 3/4 when both the numerator and denominator are decreased by i, and reduces to 4/5 when both the numerator and denominator are each increased by 1. I know the answer is 7/9, but i dont know how to solve (i must use a system of equations).

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