-7a+3=-81

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Solution for -7a+3=-81 equation: 


a in (-oo:+oo)

3-7*a = -81 // + 81

3-7*a+81 = 0

84-7*a = 0 // - 84

-7*a = -84 // : -7

a = -84/(-7)

a = 12

a = 12

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