12+3x=0

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Solution for 12+3x=0 equation:


12+3x=0

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

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

We simplify left and right side of the equation. 
+3x=-12

We divide both sides of the equation by 3 to get x. 
x=-4

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