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(40-5x)=0
We simplify the equation to the form, which is simple to understand
(40-5x)=0
Remove unnecessary parentheses
40-5x=0
We move all terms containing x to the left and all other terms to the right.
-5x=0-40
We simplify left and right side of the equation.
-5x=-40
We divide both sides of the equation by -5 to get x.
x=8
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