2d+7+6d=15

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Solution for 2d+7+6d=15 equation: 


d in (-oo:+oo)

2*d+6*d+7 = 15 // - 15

2*d+6*d-15+7 = 0

8*d-8 = 0 // + 8

8*d = 8 // : 8

d = 8/8

d = 1

d = 1

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