21=x/2

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Solution for 21=x/2 equation:


21=x/2

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

We move all terms containing x to the left and all other terms to the right. 
-0.5x=-21

We simplify left and right side of the equation. 
-0.5x=-21

We divide both sides of the equation by -00.5 to get x. 
x=42

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