-2x=x-21

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Solution for -2x=x-21 equation:


-2x = x - 21

We simplify the equation to the form, which is simple to understand 
-2x=x-21

We move all terms containing x to the left and all other terms to the right. 
-2x-1x=-21

We simplify left and right side of the equation. 
-3x=-21

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

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