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20=0.35x+x
We move all terms to the left:
20-(0.35x+x)=0
We add all the numbers together, and all the variables
-(+1.35x)+20=0
We get rid of parentheses
-1.35x+20=0
We move all terms containing x to the left, all other terms to the right
-1.35x=-20
x=-20/-1.35
x=14+1/1.2272727272727
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