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.5(.2-20)+20=x
We move all terms to the left:
.5(.2-20)+20-(x)=0
We add all the numbers together, and all the variables
-x+20+.5(-19.8)=0
We add all the numbers together, and all the variables
-1x+10.1=0
We move all terms containing x to the left, all other terms to the right
-x=-10.1
x=-10.1/-1
x=10+0.1/1
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