Question

(23+ ) + 19 = 23 + ( + 19)

Answer 1

(23+_) + 19 = 23+ (_+19)

42=42

Answer 2

Well in order to solve this we need to get the solution to each side.

(23+) +19 = 23 + ( +19)
23 + 19 23 + 19
= 42 = 42

So this means
each side equals 42

42 = 42

So this means there are infinite solutions

Good Luck! :)