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2+x/9=20
We move all terms to the left:
2+x/9-(20)=0
We add all the numbers together, and all the variables
x/9-18=0
We multiply all the terms by the denominator
x-18*9=0
We add all the numbers together, and all the variables
x-162=0
We move all terms containing x to the left, all other terms to the right
x=162
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