1/2(3-x)=21

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Solution for 1/2(3-x)=21 equation:


1/2(3-x)=21

We simplify the equation to the form, which is simple to understand 
1/2(3-x)=21

Reorder the terms in parentheses
+(+1.5-0.5x)=21

Remove unnecessary parentheses
+1.5-0.5x=+21

We move all terms containing x to the left and all other terms to the right. 
-0.5x=+21-1.5

We simplify left and right side of the equation. 
-0.5x=+19.5

We divide both sides of the equation by -0.5 to get x. 
x=-39

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