Ayuda ecuacion e inecuaciones 15+x=60​

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?