-2d+2=20

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Solution for -2d+2=20 equation: 


d in (-oo:+oo)

2-2*d = 20 // - 20

2-2*d-20 = 0

-2*d-18 = 0 // + 18

-2*d = 18 // : -2

d = 18/(-2)

d = -9

d = -9

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