7a+7=91

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Solution for 7a+7=91 equation: 


a in (-oo:+oo)

7*a+7 = 91 // - 91

7*a-91+7 = 0

7*a-84 = 0 // + 84

7*a = 84 // : 7

a = 84/7

a = 12

a = 12

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