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-2(b+19)=-20
We simplify the equation to the form, which is simple to understand
-2(b+19)=-20
Reorder the terms in parentheses
+(-2b-38)=-20
Remove unnecessary parentheses
-2b-38=-20
We move all terms containing b to the left and all other terms to the right.
-2b=-20+38
We simplify left and right side of the equation.
-2b=+18
We divide both sides of the equation by -2 to get b.
b=-9
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