Which equation is equivalent to 3[x + 3(4x – 5)] = 15x – 24? 15x – 15 = 15x – 2415x – 5 = 15x – 2439x – 45 = 15x – 2439x – 15 = 15x – 24?

Begin inside the brackets always.  Your first simplification will be to distribute the 3 into the parenthesis, resulting in this: .  We can simplify a bit more now inside the brackets like this: .  Now distribute the 3 to get 39x - 45 = 15x - 24.  That's your answer. The third one out of the 4 you have there.

221,500 is the answer