Question

how many solutions are there to the equation 9x-16=9x-23

Answer 1

Zero solutions:

9x - 16 = 9x - 23
9x - 9x - 16 = -23
-16 =/= -23

Answer 2

This is because neither of the lines intersect

Answer 3

https://www.wolframalpha.com/input/?i=graph+9x+-+16+and+9x+-+23

Answer 4

please see the link, if a solution existed the two lines would touch at a point

Answer 5

or many

Answer 6

there lines never touch so there is no solution, what are you doing with this is finding where the two functions or lines intersect