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(2x+23)=90
We move all terms to the left:
(2x+23)-(90)=0
We get rid of parentheses
2x+23-90=0
We add all the numbers together, and all the variables
2x-67=0
We move all terms containing x to the left, all other terms to the right
2x=67
x=67/2
x=33+1/2
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