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2(1+b)=-18-2b
We simplify the equation to the form, which is simple to understand
2(1+b)=-18-2b
Reorder the terms in parentheses
+(+2+2b)=-18-2b
Remove unnecessary parentheses
+2+2b=-18-2b
We move all terms containing b to the left and all other terms to the right.
+2b+2b=-18-2
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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