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x-0.80x=120
We simplify the equation to the form, which is simple to understand
x-0.80x=120
We move all terms containing x to the left and all other terms to the right.
+1x-0.8x=+120
We simplify left and right side of the equation.
+ 0.2x=+120
We divide both sides of the equation by 0.2 to get x.
x=600
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