-10+2b+7b=-91

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Solution for -10+2b+7b=-91 equation: 


b in (-oo:+oo)

2*b+7*b-10 = -91 // + 91

2*b+7*b-10+91 = 0

9*b+81 = 0 // - 81

9*b = -81 // : 9

b = -81/9

b = -9

b = -9

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