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x+21/5=9
We move all terms to the left:
x+21/5-(9)=0
determiningTheFunctionDomain x-9+21/5=0
We multiply all the terms by the denominator
x*5+21-9*5=0
We add all the numbers together, and all the variables
x*5-24=0
Wy multiply elements
5x-24=0
We move all terms containing x to the left, all other terms to the right
5x=24
x=24/5
x=4+4/5
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