Subtracting whole numbers does not include subtracting negative numbers, whereas when subtracting integers you can include negative numbers.
If

is left, that means

was spent. So

of the total amount is equal to 39.. Let's say x to the total amount.
Answer:
I think is -x + 105/42y
Step-by-step explanation:
2(3/10)x - 5/7y - 4(5/6)y - 2(4/5)x
6/10x - 5/7y - 20/6y - 8/5x
6/10x - 8/5x - 5/7y - 20/6y
6-16/10x - 35+140/42y
-10/10x + 105/42y
-x + 105/42y
Answer:
I believe the answer 16
Step-by-step explanation:
All you have to do is count.