-12=9+x

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Solution for -12=9+x equation:


-12=9+x

We simplify the equation to the form, which is simple to understand 
-12=9+x

We move all terms containing x to the left and all other terms to the right. 
-1x=+9+12

We simplify left and right side of the equation. 
-1x=+21

We divide both sides of the equation by -01 to get x. 
x=-21

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