SOLUTION: Can you please help? Thank you! Determine whether the equation defines y as a function of x X+y=9

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Question 869312: Can you please help? Thank you!
Determine whether the equation defines y as a function of x
X+y=9
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Yes,
y=9-x
So y is a function of x.