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3x+3(2x)=-18
We simplify the equation to the form, which is simple to understand
3x+3(2x)=-18
Reorder the terms in parentheses
3x+(+6x)=-18
Remove unnecessary parentheses
+3x+6x=-18
We move all terms containing x to the left and all other terms to the right.
+3x+6x=-18
We simplify left and right side of the equation.
+9x=-18
We divide both sides of the equation by 9 to get x.
x=-2
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