7+3n+7n=57

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Solution for 7+3n+7n=57 equation: 


n in (-oo:+oo)

3*n+7*n+7 = 57 // - 57

3*n+7*n-57+7 = 0

10*n-50 = 0 // + 50

10*n = 50 // : 10

n = 50/10

n = 5

n = 5

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