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7a-4=2(a+9)+4a
We simplify the equation to the form, which is simple to understand
7a-4=2(a+9)+4a
Reorder the terms in parentheses
7a-4=+(+2a+18)+4a
Remove unnecessary parentheses
+7a-4=+2a+18+4a
We move all terms containing a to the left and all other terms to the right.
+7a-2a-4a=+18+4
We simplify left and right side of the equation.
+1a=+22
We divide both sides of the equation by 1 to get a.
a=22
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