-x+21=30

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Solution for -x+21=30 equation:


-x+21=30

We simplify the equation to the form, which is simple to understand 
-x+21=30

We move all terms containing x to the left and all other terms to the right. 
-1x=+30-21

We simplify left and right side of the equation. 
-1x=+9

We divide both sides of the equation by -1 to get x. 
x=-9

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