I was camping with my math teachers friends. After dinner we all made up a word-arithmetic problems. My friend came up with this one. Each different letter stands for a different digit (0-9). Not all digits can be used however. The sum of the unused digit is 16

they will manufacture 8496 cars

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.