-2d+9=-4d+23

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Solution for -2d+9=-4d+23 equation: 


d in (-oo:+oo)

9-2*d = 23-4*d // - 23-4*d

9-2*d-(-4*d)-23 = 0

4*d-2*d-23+9 = 0

2*d-14 = 0 // + 14

2*d = 14 // : 2

d = 14/2

d = 7

d = 7

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