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90=2x-23+14+x
We move all terms to the left:
90-(2x-23+14+x)=0
We add all the numbers together, and all the variables
-(3x-9)+90=0
We get rid of parentheses
-3x+9+90=0
We add all the numbers together, and all the variables
-3x+99=0
We move all terms containing x to the left, all other terms to the right
-3x=-99
x=-99/-3
x=+33
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