85=3b+7b-5

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Solution for 85=3b+7b-5 equation: 


b in (-oo:+oo)

85 = 3*b+7*b-5 // - 3*b+7*b-5

5-(3*b)-(7*b)+85 = 0

5-3*b-7*b+85 = 0

90-10*b = 0 // - 90

-10*b = -90 // : -10

b = -90/(-10)

b = 9

b = 9

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