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40+52.45x=57.45x
We move all terms to the left:
40+52.45x-(57.45x)=0
We add all the numbers together, and all the variables
52.45x-(+57.45x)+40=0
We get rid of parentheses
52.45x-57.45x+40=0
We add all the numbers together, and all the variables
-5x+40=0
We move all terms containing x to the left, all other terms to the right
-5x=-40
x=-40/-5
x=+8
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