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7.5=x+11.3
We move all terms to the left:
7.5-(x+11.3)=0
We get rid of parentheses
-x-11.3+7.5=0
We add all the numbers together, and all the variables
-1x-3.8=0
We move all terms containing x to the left, all other terms to the right
-x=3.8
x=3.8/-1
x=-3+0.8/1
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