2=a-a

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Solution for 2=a-a equation:


2=a-a

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

We move all terms containing a to the left and all other terms to the right. 
-1a+1a=-2

We simplify left and right side of the equation. 
a=-2

0=-02

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

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