6b-9+3b=18

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Solution for 6b-9+3b=18 equation: 


b in (-oo:+oo)

6*b+3*b-9 = 18 // - 18

6*b+3*b-18-9 = 0

9*b-27 = 0 // + 27

9*b = 27 // : 9

b = 27/9

b = 3

b = 3

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