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15.000=-0.2x+20
We move all terms to the left:
15.000-(-0.2x+20)=0
We add all the numbers together, and all the variables
-(-0.2x+20)+15=0
We get rid of parentheses
0.2x-20+15=0
We add all the numbers together, and all the variables
0.2x-5=0
We move all terms containing x to the left, all other terms to the right
0.2x=5
x=5/0.2
x=25
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