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118=21x-1
We move all terms to the left:
118-(21x-1)=0
We get rid of parentheses
-21x+1+118=0
We add all the numbers together, and all the variables
-21x+119=0
We move all terms containing x to the left, all other terms to the right
-21x=-119
x=-119/-21
x=5+2/3
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