Twenty-eight is four times a number x

Answer 1

(set up the equation)

4 * x = 28

(isolate x by dividing 28 by 4)

x = 28/4

(actually perform the division)

x = 7

Answer 2

To solve a division problem we can do the inverse. For example, the inverse of 5x4=20 is 20/4=5. This works for both multiplication and division.

If we know that 28/4=7 then we can switch to the inverse that 7x4=28.

I hope this helps!