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(3x+2)+1=90
We move all terms to the left:
(3x+2)+1-(90)=0
We add all the numbers together, and all the variables
(3x+2)-89=0
We get rid of parentheses
3x+2-89=0
We add all the numbers together, and all the variables
3x-87=0
We move all terms containing x to the left, all other terms to the right
3x=87
x=87/3
x=29
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