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800=x+x0.7
We move all terms to the left:
800-(x+x0.7)=0
We add all the numbers together, and all the variables
-(+x+x0.7)+800=0
We get rid of parentheses
-x-x0.7+800=0
We add all the numbers together, and all the variables
-1x-x0.7+800=0
We move all terms containing x to the left, all other terms to the right
-1x-x0.7=-800
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