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13,9-x=17,8
We simplify the equation to the form, which is simple to understand
13,9-x=17,8
We move all terms containing x to the left and all other terms to the right.
-1x=+17.8-13.9
We simplify left and right side of the equation.
-1x=+3.9
We divide both sides of the equation by -1 to get x.
x=-3.9
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