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-0.5x=20
We simplify the equation to the form, which is simple to understand
-0.5x=20
We move all terms containing x to the left and all other terms to the right.
-0.5x=+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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