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-30+8x=42+12x
We simplify the equation to the form, which is simple to understand
-30+8x=42+12x
We move all terms containing x to the left and all other terms to the right.
+8x-12x=+42+30
We simplify left and right side of the equation.
-4x=+72
We divide both sides of the equation by -4 to get x.
x=-18
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