-a+6+7a=-66 - solution

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Solution for -a+6+7a=-66 equation:

a in (-oo:+oo)

7*a-a+6 = -66 // + 66

7*a-a+6+66 = 0

6*a+72 = 0 // - 72

6*a = -72 // : 6

a = -72/6

a = -12

a = -12

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