4d+9-7d=-3

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Solution for 4d+9-7d=-3 equation: 


d in (-oo:+oo)

4*d-(7*d)+9 = -3 // + 3

4*d-(7*d)+3+9 = 0

4*d-7*d+3+9 = 0

12-3*d = 0 // - 12

-3*d = -12 // : -3

d = -12/(-3)

d = 4

d = 4

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