During the three days of kayaking, the schoolchildren swam 90 km. On the first day they swam 43 km

During the three days of kayaking, the schoolchildren swam 90 km. On the first day they swam 43 km, which is 14 km. More than the second. How many km did the schoolchildren swim in the third day of the hike?

decision:
1) 43-14 = 29 (km) -for 2 days a schoolboy swam in kayaks
2) 43 + 29 = 72 (km) – schoolchildren swam in kayaks in 1 day
3) 90-72 = 18 (km)
Answer: Schoolchildren swam 18 km on the third day