21=6+x/2

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Solution for 21=6+x/2 equation:


21=6+x/2

We simplify the equation to the form, which is simple to understand 
21=6+x/2

Simplifying:
21=6 + 0.5x

We move all terms containing x to the left and all other terms to the right. 
-0.5x=+6-21

We simplify left and right side of the equation. 
-0.5x=-15

We divide both sides of the equation by -00.5 to get x. 
x=30

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