-31=4d+2d-7

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Solution for -31=4d+2d-7 equation: 


d in (-oo:+oo)

-31 = 4*d+2*d-7 // - 4*d+2*d-7

7-(4*d)-(2*d)-31 = 0

7-4*d-2*d-31 = 0

-6*d-24 = 0 // + 24

-6*d = 24 // : -6

d = 24/(-6)

d = -4

d = -4

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