The equation x = 3 represents a vertical line and not a mapping from values of x to values of y. For one thing, it fails the vertical line test for functions at the value x = 3.
4/6=2/3 2/3+x/3+3/2 apply rule a/c+-b/c=(a+-b)/c (2+x)/3+3/2 is your final answer remove the parenthesis if you want i was just trying to show 2+x over 3
