Question 985566
 n-3/4 + n+5/7= 5/4
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Multiply thru by 28 to get:
7(n-3) + 4(n+5) = 7*5
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7n-21+4n+20 = 35
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11n-1 = 35
11n = 36
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n = 3 3/11
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Cheers,
Stan H.