Let's solve for x:
24x + 33 = 3(5x + 21) - 9
Expanding the right side:
24x + 33 = 15x + 63 - 9
Simplifying the equation:
24x + 33 = 15x + 54
Subtracting 15x from both sides:
9x + 33 = 54
Subtracting 33 from both sides:
9x = 21
Dividing both sides by 9:
x = 21/9
Simplifying:
x = 7/3
Therefore, the value of x that makes the equation true is 7/3.