21+x=2(6-x)

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Solution for 21+x=2(6-x) equation:


21+x=2(6-x)

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

Reorder the terms in parentheses
21+x=+(+12-2x)

Remove unnecessary parentheses
+21+x=+12-2x

We move all terms containing x to the left and all other terms to the right. 
+1x+2x=+12-21

We simplify left and right side of the equation. 
+3x=-9

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

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