9x+3x+12=0

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Solution for 9x+3x+12=0 equation:


9x+3x+12=0

We simplify the equation to the form, which is simple to understand 
9x+3x+12=0

We move all terms containing x to the left and all other terms to the right. 
+9x+3x=0-12

We simplify left and right side of the equation. 
+12x=-12

We divide both sides of the equation by 12 to get x. 
x=-1

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