13=2b-b+4 - solution

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Solution for 13=2b-b+4 equation:

b in (-oo:+oo)

13 = 2*b-b+4 // - 2*b-b+4

b-(2*b)-4+13 = 0

b-2*b-4+13 = 0

9-b = 0 // - 9

-b = -9 // * -1

b = 9

b = 9

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