7(8-7d)=-91

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Solution for 7(8-7d)=-91 equation: 


d in (-oo:+oo)

7*(8-(7*d)) = -91 // + 91

7*(8-(7*d))+91 = 0

7*(8-7*d)+91 = 0

7*(8-7*d)+91 = 0

147-49*d = 0

147-49*d = 0

147-49*d = 0 // - 147

-49*d = -147 // : -49

d = -147/(-49)

d = 3

d = 3

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