7(-1a-1)=77

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Solution for 7(-1a-1)=77 equation: 


a in (-oo:+oo)

7*(-1*a-1) = 77 // - 77

7*(-1*a-1)-77 = 0

7*(-a-1)-77 = 0

7*(-a-1)-77 = 0

-7*a-84 = 0

-7*a-84 = 0

-7*a-84 = 0 // + 84

-7*a = 84 // : -7

a = 84/(-7)

a = -12

a = -12

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