Answer:
Advance - $30
Same day - $25
Explanation:
Notice that if 35 advance and 25 same-day were sold, that means 25 "combos" and 10 advance tickets. 25 combos cost 25*$55=$1375
That leaves $1675-$1375=$300 for the advance tickets.
10 advance tickets cost $300, so 1 costs $300/10 = $30.
That means a same-day ticket costs $55-$30=$25.
Just to reverify:
35*$30 + 25*$25 = $1675.