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23x-2=8+21x
We move all terms to the left:
23x-2-(8+21x)=0
We add all the numbers together, and all the variables
23x-(21x+8)-2=0
We get rid of parentheses
23x-21x-8-2=0
We add all the numbers together, and all the variables
2x-10=0
We move all terms containing x to the left, all other terms to the right
2x=10
x=10/2
x=5
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