21+7x=42

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Solution for 21+7x=42 equation:


21+7x=42

We simplify the equation to the form, which is simple to understand 
21+7x=42

We move all terms containing x to the left and all other terms to the right. 
+7x=+42-21

We simplify left and right side of the equation. 
+7x=+21

We divide both sides of the equation by 7 to get x. 
x=3

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