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(18+x)2/3=30
We move all terms to the left:
(18+x)2/3-(30)=0
We add all the numbers together, and all the variables
(x+18)2/3-30=0
We multiply all the terms by the denominator
(x+18)2-30*3=0
We add all the numbers together, and all the variables
(x+18)2-90=0
We multiply parentheses
2x+36-90=0
We add all the numbers together, and all the variables
2x-54=0
We move all terms containing x to the left, all other terms to the right
2x=54
x=54/2
x=27
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