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x/2+20=0
We simplify the equation to the form, which is simple to understand
x/2+20=0
We move all terms containing x to the left and all other terms to the right.
+ 0.5x=0-20
We simplify left and right side of the equation.
+ 0.5x=-20
We divide both sides of the equation by 0.5 to get x.
x=-40
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