Answer:
Explanation:
x
x+4
3(x + 4)
3(x + 4) - 7
3(x + 4) - 7 - 3x
You should always get 12 - 7 = 5 no matter what the starting number was.
20 + 4 = 24
3*24 = 72
72 - 7 = 65
The original number was 20. 3 * 20 = 60
The remainder is 5 when 60 is subtracted. Try it yourself.