88777 -
56758
32019
EXPLANATION
We can write this as addition: ?2019+5675?=8?777 so 9+?=7 or 9+?=17. There must be a carryover so this ones question mark must be an 8. So 1+5+carryover=7 in the tens.
2+6 in the thousands = 8.
?+5=8 so ten thousands question mark must be 3.