7b+3=-9+4b - solution

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Solution for 7b+3=-9+4b equation:

b in (-oo:+oo)

7*b+3 = 4*b-9 // - 4*b-9

7*b-(4*b)+3+9 = 0

7*b-4*b+3+9 = 0

3*b+12 = 0 // - 12

3*b = -12 // : 3

b = -12/3

b = -4

b = -4

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