Algebra
posted by Ash on .
What is the sum of all possible digits that could fill in the blank
in 47_021 so that the resulting five digit number is divisible by 3?

If you post your answers to this and your other questions, someone will check them for you. However, we don't just "give" answers on this homework board.

im confused on how to go about the problem. that's y i need help on how to start.

4 + 7 + 2 + 1 = 14
What numbers can you put in the blank so that the numbers add up to 15, 18, and 21?