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31-12x=39
We simplify the equation to the form, which is simple to understand
31-12x=39
We move all terms containing x to the left and all other terms to the right.
-12x=+39-31
We simplify left and right side of the equation.
-12x=+8
We divide both sides of the equation by -12 to get x.
x=-0.666666666667
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