an adult membership cost 10 and a student membership cost 5 at the end of the night 50 membership were sold for a total of 400. how many member ships were sold from adult and kids.
Let adult membership = A
Student membership =50 - A
10A + 5(50 -A) = 400
10A + 250 - 5A = 400
5A = 400 - 250
5A = 150
A = 150 / 5
A =30 Adult memberships sold
50 - 30 =20 Student membership sold.
