4+7d=-6d-87

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Solution for 4+7d=-6d-87 equation: 


d in (-oo:+oo)

7*d+4 = -6*d-87 // + -6*d-87

7*d-(-6*d)+4+87 = 0

7*d+6*d+4+87 = 0

13*d+91 = 0 // - 91

13*d = -91 // : 13

d = -91/13

d = -7

d = -7

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