9-b/3=12

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Solution for 9-b/3=12 equation: 


b in (-oo:+oo)

9-(b/3) = 12 // - 12

9-(b/3)-12 = 0

-1/3*b-3 = 0 // + 3

-1/3*b = 3 // : -1/3

b = 3/(-1/3)

b = -9

b = -9

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