If x=y=x+y, find the value of (2=3)=5?

That makes no sense to me.

It looks like you are using "=" as an operator. I'll change it to @, giving us

if x@y = x+y, then
(2@3)@5 = (2+3)@5 = 5@5 = 5+5 = 10

If that's not what you had in mind, then maybe you can elucidate.

It seems that there may be a mistake in the expression you have provided. The equation you mentioned, "x=y=x+y," is not logically consistent. It appears that the equals sign has been mistakenly interchanged with the assignment operator "=".

In a mathematical equation, the equals sign (=) is used to assert that two values are equal. On the other hand, the assignment operator (=) is used to assign a value to a variable.

To clarify, a valid equation could be "x = y = x + y," in which you're assigning the sum of x and y to both x and y simultaneously. However, even in this case, it would not be possible to find a numerical value for (2 = 3) = 5 because it contains an invalid expression.

If you have a different equation or further clarification, please let me know, and I'll be happy to assist you in solving it.