7n+7+5n=91

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Solution for 7n+7+5n=91 equation: 


n in (-oo:+oo)

7*n+5*n+7 = 91 // - 91

7*n+5*n-91+7 = 0

12*n-84 = 0 // + 84

12*n = 84 // : 12

n = 84/12

n = 7

n = 7

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