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40.13=18.53+3x
We move all terms to the left:
40.13-(18.53+3x)=0
We add all the numbers together, and all the variables
-(3x+18.53)+40.13=0
We get rid of parentheses
-3x-18.53+40.13=0
We add all the numbers together, and all the variables
-3x+21.6=0
We move all terms containing x to the left, all other terms to the right
-3x=-21.6
x=-21.6/-3
x=7+0.6/3
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