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-5x+18+12x=0
We simplify the equation to the form, which is simple to understand
-5x+18+12x=0
We move all terms containing x to the left and all other terms to the right.
-5x+12x=0-18
We simplify left and right side of the equation.
+7x=-18
We divide both sides of the equation by 7 to get x.
x=-2.57142857143
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