3x-9+x=31

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Solution for 3x-9+x=31 equation:


3x-9+x=31

We simplify the equation to the form, which is simple to understand 
3x-9+x=31

We move all terms containing x to the left and all other terms to the right. 
+3x+1x=+31+9

We simplify left and right side of the equation. 
+4x=+40

We divide both sides of the equation by 4 to get x. 
x=10

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