84=-7d-2d-6

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Solution for 84=-7d-2d-6 equation: 


d in (-oo:+oo)

84 = -7*d-(2*d)-6 // + -7*d-(2*d)-6

2*d-(-7*d)+6+84 = 0

7*d+2*d+6+84 = 0

9*d+90 = 0 // - 90

9*d = -90 // : 9

d = -90/9

d = -10

d = -10

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