-7d+8-2d=-28

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Solution for -7d+8-2d=-28 equation: 


d in (-oo:+oo)

8-7*d-(2*d) = -28 // + 28

8-7*d-(2*d)+28 = 0

8-7*d-2*d+28 = 0

36-9*d = 0 // - 36

-9*d = -36 // : -9

d = -36/(-9)

d = 4

d = 4

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