2(-1a+1)=-18

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Solution for 2(-1a+1)=-18 equation: 


a in (-oo:+oo)

2*(1-1*a) = -18 // + 18

2*(1-1*a)+18 = 0

2*(1-a)+18 = 0

2*(1-a)+18 = 0

20-2*a = 0

20-2*a = 0

20-2*a = 0 // - 20

-2*a = -20 // : -2

a = -20/(-2)

a = 10

a = 10

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