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(x-81)=0
We simplify the equation to the form, which is simple to understand
(x-81)=0
Remove unnecessary parentheses
x-81=0
We move all terms containing x to the left and all other terms to the right.
+1x=0+81
We simplify left and right side of the equation.
+1x=+81
We divide both sides of the equation by 1 to get x.
x=81
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