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108.5-x=53.9
We simplify the equation to the form, which is simple to understand
108.5-x=53.9
We move all terms containing x to the left and all other terms to the right.
-1x=+53.9-108.5
We simplify left and right side of the equation.
-1x=-54.6
We divide both sides of the equation by -1 to get x.
x=54.6
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