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x+3=3x-120
We simplify the equation to the form, which is simple to understand
x+3=3x-120
We move all terms containing x to the left and all other terms to the right.
+1x-3x=-120-3
We simplify left and right side of the equation.
-2x=-123
We divide both sides of the equation by -2 to get x.
x=61.5
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