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-4(4+3a)=-239
We simplify the equation to the form, which is simple to understand
-4(4+3a)=-239
Reorder the terms in parentheses
+(-16-12a)=-239
Remove unnecessary parentheses
-16-12a=-239
We move all terms containing a to the left and all other terms to the right.
-12a=-239+16
We simplify left and right side of the equation.
-12a=-223
We divide both sides of the equation by -12 to get a.
a=18.583333333333
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