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-8.6=x-13.2
We move all terms to the left:
-8.6-(x-13.2)=0
We get rid of parentheses
-x+13.2-8.6=0
We add all the numbers together, and all the variables
-1x+4.6=0
We move all terms containing x to the left, all other terms to the right
-x=-4.6
x=-4.6/-1
x=4+0.6/1
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