3+9x=21

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Solution for 3+9x=21 equation:


3+9x=21

We simplify the equation to the form, which is simple to understand 
3+9x=21

We move all terms containing x to the left and all other terms to the right. 
+9x=+21-3

We simplify left and right side of the equation. 
+9x=+18

We divide both sides of the equation by 9 to get x. 
x=2

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