Answer:
r = 0
Explanation:
- Subtract 28 from each side, so it now looks like this: 0 = 4r
- Divide 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 + 28
- 0 + 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.