20=1/2(70-x)

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Solution for 20=1/2(70-x) equation:


20=1/2(70-x)

We simplify the equation to the form, which is simple to understand 
20=1/2(70-x)

Reorder the terms in parentheses
20=+(+35-0.5x)

Remove unnecessary parentheses
+20=+35-0.5x

We move all terms containing x to the left and all other terms to the right. 
 + 0.5x=+35-20

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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