3x+9=x-4

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Solution for 3x+9=x-4 equation:


3x+9=x-4

We simplify the equation to the form, which is simple to understand 
3x+9=x-4

We move all terms containing x to the left and all other terms to the right. 
+3x-1x=-4-9

We simplify left and right side of the equation. 
+2x=-13

We divide both sides of the equation by 2 to get x. 
x=-6.5

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