24x + 28 + 9 = 24x + 37
24x + 37 = 24x + 37
0 = 0
Infinitely many solutions.No matter what value you put in for x, it makes the equation true.
Had you ended up with something like 0 = 6, that's no solution. No value of x would have made the equation true.
Something like x = 12 is one solution. Twelve would be the only value x could be to make the equation true.