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5x+7(-2x+3)=-87
We simplify the equation to the form, which is simple to understand
5x+7(-2x+3)=-87
Reorder the terms in parentheses
5x+(-14x+21)=-87
Remove unnecessary parentheses
+5x-14x+21=-87
We move all terms containing x to the left and all other terms to the right.
+5x-14x=-87-21
We simplify left and right side of the equation.
-9x=-108
We divide both sides of the equation by -9 to get x.
x=12
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