3+b=4b-18

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Solution for 3+b=4b-18 equation: 


b in (-oo:+oo)

b+3 = 4*b-18 // - 4*b-18

b-(4*b)+3+18 = 0

b-4*b+3+18 = 0

21-3*b = 0 // - 21

-3*b = -21 // : -3

b = -21/(-3)

b = 7

b = 7

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