90=b+7b+2

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Solution for 90=b+7b+2 equation: 


b in (-oo:+oo)

90 = b+7*b+2 // - b+7*b+2

90-b-(7*b)-2 = 0

90-b-7*b-2 = 0

88-8*b = 0 // - 88

-8*b = -88 // : -8

b = -88/(-8)

b = 11

b = 11

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