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-12=-3x+144x-x
We simplify the equation to the form, which is simple to understand
-12=-3x+144x-x
We move all terms containing x to the left and all other terms to the right.
+3x-144x+1x=+12
We simplify left and right side of the equation.
-140x=+12
We divide both sides of the equation by -140 to get x.
x=-0.0857142857143
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