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39.95+0.12x=19.95+0.28x
We move all terms to the left:
39.95+0.12x-(19.95+0.28x)=0
We add all the numbers together, and all the variables
0.12x-(0.28x+19.95)+39.95=0
We get rid of parentheses
0.12x-0.28x-19.95+39.95=0
We add all the numbers together, and all the variables
-0.16x+20=0
We move all terms containing x to the left, all other terms to the right
-0.16x=-20
x=-20/-0.16
x=+125
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