"can i get that number bbg ;)"

7282827728292873

Step-by-step explanation:

74839477492928

Look in comments

r = 0

Step-by-step explanation:

Subtract 28 from each side, so it now looks like this: 0 = 4rDivide each side by 4, to cancel out the 4 attached to the r. It should now look like this: 0 = r.0 remains a 0 because 0 can't be divided.

Therefore, r = 0.

Check to see if it works:

4 × 0 = 0. This is because anything times 0 is 0.Plug 0 in: 28 = 0 + 280 + 28 = 28

Therefore, we know 0 is the right answer because as it says in the last step,

0 + 28 is indeed equal to 28, which the problem says is the answer.