For this equation will have no solution when
9x = h3x = 3hx
Then,
9x = 3hx
9 = 3h
h = 9/3
h = 3
Then,
9x + 18 = 3 ( 3x + 6 )
9x + 18 = 9x + 6
Then, the equation will have an inconsistent result:
If we subtract 9x at both sides, we finally have:
9x - 9x + 18 = 9x - 9x + 6
0 + 18 = 6
18 = 6
Therefore, for h = 3, this equation will have no solution.