-7=21+x

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Solution for -7=21+x equation:


-7=21+x

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

We move all terms containing x to the left and all other terms to the right. 
-1x=+21+7

We simplify left and right side of the equation. 
-1x=+28

We divide both sides of the equation by -01 to get x. 
x=-28

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