7+7a=84

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Solution for 7+7a=84 equation: 


a in (-oo:+oo)

7*a+7 = 84 // - 84

7*a-84+7 = 0

7*a-77 = 0 // + 77

7*a = 77 // : 7

a = 77/7

a = 11

a = 11

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