b+7=-13+3b

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Solution for b+7=-13+3b equation: 


b in (-oo:+oo)

b+7 = 3*b-13 // - 3*b-13

b-(3*b)+7+13 = 0

b-3*b+7+13 = 0

20-2*b = 0 // - 20

-2*b = -20 // : -2

b = -20/(-2)

b = 10

b = 10

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