12=4(a-9)

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Solution for 12=4(a-9) equation:


12=4(a-9)

We simplify the equation to the form, which is simple to understand 
12=4(a-9)

Reorder the terms in parentheses
12=+(+4a-36)

Remove unnecessary parentheses
+12=+4a-36

We move all terms containing a to the left and all other terms to the right. 
-4a=-36-12

We simplify left and right side of the equation. 
-4a=-48

We divide both sides of the equation by -04 to get a. 
a=12

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