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

Algebra ->  College  -> Linear Algebra -> SOLUTION: if xy=yx and y=3x, then x is equal to?       Log On


   

Question 1085564: if xy=yx and y=3x, then x is equal to?
Answer by ikleyn(52775) 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.