-7a=21

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Solution for -7a=21 equation:


-7a=21

We simplify the equation to the form, which is simple to understand 
-7a=21

We move all terms containing a to the left and all other terms to the right. 
-7a=+21

We simplify left and right side of the equation. 
-7a=+21

We divide both sides of the equation by -7 to get a. 
a=-3

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