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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

Guest May 1, 2017
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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. 

Guest May 1, 2017

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