The statement 25% of 12 is 3 has three numbers. in real life problems, any one of these numbers can be unknown.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

139 divided by a number

step-by-step explanation:

grace would use 12 apple slices