-7d+7+d=1

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Solution for -7d+7+d=1 equation: 


d in (-oo:+oo)

d-7*d+7 = 1 // - 1

d-7*d-1+7 = 0

6-6*d = 0 // - 6

-6*d = -6 // : -6

d = -6/(-6)

d = 1

d = 1

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