40=-2d+5d+4

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Solution for 40=-2d+5d+4 equation: 


d in (-oo:+oo)

40 = 5*d-2*d+4 // - 5*d-2*d+4

40-(-2*d)-(5*d)-4 = 0

2*d-5*d-4+40 = 0

36-3*d = 0 // - 36

-3*d = -36 // : -3

d = -36/(-3)

d = 12

d = 12

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