21=3(x-6)

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Solution for 21=3(x-6) equation:


21=3(x-6)

We simplify the equation to the form, which is simple to understand 
21=3(x-6)

Reorder the terms in parentheses
21=+(+3x-18)

Remove unnecessary parentheses
+21=+3x-18

We move all terms containing x to the left and all other terms to the right. 
-3x=-18-21

We simplify left and right side of the equation. 
-3x=-39

We divide both sides of the equation by -03 to get x. 
x=13

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