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b+8-8b=-3b-12
We simplify the equation to the form, which is simple to understand
b+8-8b=-3b-12
We move all terms containing b to the left and all other terms to the right.
+1b-8b+3b=-12-8
We simplify left and right side of the equation.
-4b=-20
We divide both sides of the equation by -4 to get b.
b=5
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