You sell tickets for admission for your school play and collect $104. admission is $6 for adults and $4 for children. you sold 21 tickets. how many adult tickets and children tickets did you sell?

A + c = 21a = 21 - c
6a + 4c = 104

6(21 - c) + 4c = 104
126 - 6c + 4c = 104
-6c + 4c = 104 - 126
-2c = - 22
c = -22/-2
c = 11 <=== u sold 11 children's tickets

a + c = 21
a + 11 = 21
a = 21 - 11
a = 10 <=== u sold 10 adult tickets

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.