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168=-4(8a-2)
We simplify the equation to the form, which is simple to understand
168=-4(8a-2)
Reorder the terms in parentheses
168=+(-32a+8)
Remove unnecessary parentheses
+168=-32a+8
We move all terms containing a to the left and all other terms to the right.
+32a=+8-168
We simplify left and right side of the equation.
+32a=-160
We divide both sides of the equation by 032 to get a.
a=-5
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