x-4x+21=-12

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Solution for x-4x+21=-12 equation:


x-4x+21=-12

We simplify the equation to the form, which is simple to understand 
x-4x+21=-12

We move all terms containing x to the left and all other terms to the right. 
+1x-4x=-12-21

We simplify left and right side of the equation. 
-3x=-33

We divide both sides of the equation by -3 to get x. 
x=11

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