2+4d-7d=-7

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


d in (-oo:+oo)

4*d-(7*d)+2 = -7 // + 7

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

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

9-3*d = 0 // - 9

-3*d = -9 // : -3

d = -9/(-3)

d = 3

d = 3

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