2d+7=7d+12

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Solution for 2d+7=7d+12 equation: 


d in (-oo:+oo)

2*d+7 = 7*d+12 // - 7*d+12

2*d-(7*d)-12+7 = 0

2*d-7*d-12+7 = 0

-5*d-5 = 0 // + 5

-5*d = 5 // : -5

d = 5/(-5)

d = -1

d = -1

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