-7d+5+2d=-20

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Solution for -7d+5+2d=-20 equation: 


d in (-oo:+oo)

2*d-7*d+5 = -20 // + 20

2*d-7*d+5+20 = 0

25-5*d = 0 // - 25

-5*d = -25 // : -5

d = -25/(-5)

d = 5

d = 5

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