7x-x+3x=81

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Solution for 7x-x+3x=81 equation:


7x-x+3x=81

We simplify the equation to the form, which is simple to understand 
7x-x+3x=81

We move all terms containing x to the left and all other terms to the right. 
+7x-1x+3x=+81

We simplify left and right side of the equation. 
+9x=+81

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

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