3=-3b+2b-9

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Solution for 3=-3b+2b-9 equation: 


b in (-oo:+oo)

3 = 2*b-3*b-9 // - 2*b-3*b-9

3-(-3*b)-(2*b)+9 = 0

3*b-2*b+3+9 = 0

b+12 = 0 // - 12

b = -12

b = -12

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