SOLUTION: if xy=yx and y=3x, then x is equal to?

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Question 1085564: if xy=yx and y=3x, then x is equal to?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
xy = yx   is ALWAYS TRUE for real numbers due to commutativity property of multiplication.

          Therefore, this identity does not bring any restrictive information to you.


The only restriction/equation is y = 3x, and it implies x =  y%2F3.

Answer. From the given condition, x = y%2F3.