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30 + 0.20x=20 + 0.40x
We simplify the equation to the form, which is simple to understand
30 + 0.20x=20 + 0.40x
We move all terms containing x to the left and all other terms to the right.
+ 0.2x-0.4x=+20-30
We simplify left and right side of the equation.
-0.2x=-10
We divide both sides of the equation by -0.2 to get x.
x=50
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