Answer:
Numbers 1 and 4 are equivalent :D
Explanation:
8x-24 is the equation that we want to see if anything is equivalent to, so let's start from top to bottom and figure out which ones are equivalent.
1. 8(x-3):
This is the same as 8 * whatever is in parenthesis, so it is simplified to 8x-24, which is equivalent :D
2. 8(x-24):
This is the same as 8x-192, which is not equivalent :(
3. 9(x-3)-(x-3):
This is the same as 9x-27-x-3, which is 8x-30, which is not equivalent :(
4. (5+3)x-24:
This is the same as (8)x-24, or 8x-24, which is equivalent :D
5. 16x
This is already fully simplified, and 16x does not equal 8x-24, which means it is not equivalent :(