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(x+10)+(1-x)11)=10.81
We move all terms to the left:
(x+10)+(1-x)11)-(10.81)=0
We add all the numbers together, and all the variables
(x+10)+(-1x+1)11)-(10.81)=0
We get rid of parentheses
x+(-1x+1)11)-(10.81)+10=0
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