SOLUTION: Determine whether it is linear: 7x-9+5y=x-3? -3x=7? 0.09x-0.2y=3.3?

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Question 908391: Determine whether it is linear:
7x-9+5y=x-3?
-3x=7?
0.09x-0.2y=3.3?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Yes, all three are linear. Exponents on x or y are 1. The second equation is still also linear; it could be just a point on a line, or it could be a vertical line including all real number values for y and only one value for x.