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-16x+81=0
We simplify the equation to the form, which is simple to understand
-16x+81=0
We move all terms containing x to the left and all other terms to the right.
-16x=0-81
We simplify left and right side of the equation.
-16x=-81
We divide both sides of the equation by -16 to get x.
x=5.0625
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