-81=-21+12x

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Solution for -81=-21+12x equation:


-81=-21+12x

We simplify the equation to the form, which is simple to understand 
-81=-21+12x

We move all terms containing x to the left and all other terms to the right. 
-12x=-21+81

We simplify left and right side of the equation. 
-12x=+60

We divide both sides of the equation by -012 to get x. 
x=-5

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