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538=x+128.8
We move all terms to the left:
538-(x+128.8)=0
We get rid of parentheses
-x-128.8+538=0
We add all the numbers together, and all the variables
-1x+409.2=0
We move all terms containing x to the left, all other terms to the right
-x=-409.2
x=-409.2/-1
x=409+0.19999999999999/1
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