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1.28=x-220/20
We move all terms to the left:
1.28-(x-220/20)=0
We add all the numbers together, and all the variables
-(x-11)+1.28=0
We get rid of parentheses
-x+11+1.28=0
We add all the numbers together, and all the variables
-1x+12.28=0
We move all terms containing x to the left, all other terms to the right
-x=-12.28
x=-12.28/-1
x=12+0.28/1
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