2x+7x=21

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Solution for 2x+7x=21 equation:


2x+7x=21

We simplify the equation to the form, which is simple to understand 
2x+7x=21

We move all terms containing x to the left and all other terms to the right. 
+2x+7x=+21

We simplify left and right side of the equation. 
+9x=+21

We divide both sides of the equation by 9 to get x. 
x=2.33333333333

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