2d-8+7d=-71

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Solution for 2d-8+7d=-71 equation: 


d in (-oo:+oo)

2*d+7*d-8 = -71 // + 71

2*d+7*d-8+71 = 0

9*d+63 = 0 // - 63

9*d = -63 // : 9

d = -63/9

d = -7

d = -7

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