21(-1/7)=x

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Solution for 21(-1/7)=x equation:


21(-1/7)=x

We simplify the equation to the form, which is simple to understand 
21(-1/7)=x

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

Remove unnecessary parentheses
-3=+x

We move all terms containing x to the left and all other terms to the right. 
-1x=+3

We simplify left and right side of the equation. 
-1x=+3

We divide both sides of the equation by -01 to get x. 
x=-3

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