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-126=6(7-4a)
We simplify the equation to the form, which is simple to understand
-126=6(7-4a)
Reorder the terms in parentheses
-126=+(+42-24a)
Remove unnecessary parentheses
-126=+42-24a
We move all terms containing a to the left and all other terms to the right.
+24a=+42+126
We simplify left and right side of the equation.
+24a=+168
We divide both sides of the equation by 024 to get a.
a=7
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