Which expression is equivalent to 6 (3 x minus 4) ?

I'm pretty sure it's 18x + 24

6 (3x - 4)

substitute 6 by multiplying 3x and 4

18x - 24 for one possibility

another possibility understanding your question in

6 (3 * - 4)

first multiply 3 times - 4

which is equal to - 12

then multiply it by 6

-72 is the answer