Answer: 3 units to the left of three because the answer would be -3
Step-by-step-explanation: If we subtract 6 from 3, we get -3. Pretend these are dolars. So we have 3
How many dolars do you have left?
Well, we pay them the three we have, but then we owe them $3, because they still need $6 total.
We owe them 3 dolars, or we have -3 dollars.
Now let's just put a dot where -3 is on a number line.
Another way to look at this would be we started with 3 (blue dot) and we subtract 6, or move 6 to the left to get our red dot...which is -3
Either way you do it, -3 (which is the red dot) is your answer.