21+(-3x)=-12x+39

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Solution for 21+(-3x)=-12x+39 equation:


21+(-3x)=-12x+39

We simplify the equation to the form, which is simple to understand 
21+(-3x)=-12x+39

Remove unnecessary parentheses
+21-3x=-12x+39

We move all terms containing x to the left and all other terms to the right. 
-3x+12x=+39-21

We simplify left and right side of the equation. 
+9x=+18

We divide both sides of the equation by 9 to get x. 
x=2

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