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