Answer: y = z and y = 137/5
Step-by-step explanation: From the equation xy = xz, x cancels out on both ends so you end up with y = z.
Additionally, you can use the second equation, x = 6x - 23 and simplify it to 5x = 23, then x = 23/5.
You can then plug in that value of x into the third equation: z = 4(23/5) +9, then z = 92/5 + 9, then z = 137/5
Since z = y, this applies to y as well
Therefore, y = z and y = 137/5
