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b-6-4b=-12-b
We simplify the equation to the form, which is simple to understand
b-6-4b=-12-b
We move all terms containing b to the left and all other terms to the right.
+1b-4b+1b=-12+6
We simplify left and right side of the equation.
-2b=-6
We divide both sides of the equation by -2 to get b.
b=3
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