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800=39x+11x+5.5x
We move all terms to the left:
800-(39x+11x+5.5x)=0
We add all the numbers together, and all the variables
-(+55.5x)+800=0
We get rid of parentheses
-55.5x+800=0
We move all terms containing x to the left, all other terms to the right
-55.5x=-800
x=-800/-55.5
x=14+23/55.5
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