7n+3+6n=120 - solution

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Solution for 7n+3+6n=120 equation:

n in (-oo:+oo)

7*n+6*n+3 = 120 // - 120

7*n+6*n-120+3 = 0

13*n-117 = 0 // + 117

13*n = 117 // : 13

n = 117/13

n = 9

n = 9

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