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3 b+12=9-6b
We simplify the equation to the form, which is simple to understand
3b+12=9-6b
We move all terms containing b to the left and all other terms to the right.
+3b+6b=+9-12
We simplify left and right side of the equation.
+9b=-3
We divide both sides of the equation by 9 to get b.
b=-0.333333333333
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