9=-7-3-a+a

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Solution for 9=-7-3-a+a equation:


9=-7-3-a+a

We simplify the equation to the form, which is simple to understand 
9=-7-3-a+a

We move all terms containing a to the left and all other terms to the right. 
+1a-1a=-7-3-9

We simplify left and right side of the equation. 
a=-19

0=-19

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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