12=-4-4a-4a

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Solution for 12=-4-4a-4a equation:


12=-4-4a-4a

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

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

We simplify left and right side of the equation. 
+8a=-16

We divide both sides of the equation by 8 to get a. 
a=-2

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