55=-2b+6b+7

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Solution for 55=-2b+6b+7 equation: 


b in (-oo:+oo)

55 = 6*b-2*b+7 // - 6*b-2*b+7

55-(-2*b)-(6*b)-7 = 0

2*b-6*b-7+55 = 0

48-4*b = 0 // - 48

-4*b = -48 // : -4

b = -48/(-4)

b = 12

b = 12

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