2(-1a-6)=-20

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Solution for 2(-1a-6)=-20 equation: 


a in (-oo:+oo)

2*(-1*a-6) = -20 // + 20

2*(-1*a-6)+20 = 0

2*(-a-6)+20 = 0

2*(-a-6)+20 = 0

8-2*a = 0

8-2*a = 0

8-2*a = 0 // - 8

-2*a = -8 // : -2

a = -8/(-2)

a = 4

a = 4

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