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-2(7+4x)=-86
We simplify the equation to the form, which is simple to understand
-2(7+4x)=-86
Reorder the terms in parentheses
+(-14-8x)=-86
Remove unnecessary parentheses
-14-8x=-86
We move all terms containing x to the left and all other terms to the right.
-8x=-86+14
We simplify left and right side of the equation.
-8x=-72
We divide both sides of the equation by -8 to get x.
x=9
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