SOLUTION: Jen Butler has been pricing​ Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $ 80Two adults and three children must pay $ 57.&#8

Algebra ->  Linear-equations -> SOLUTION: Jen Butler has been pricing​ Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $ 80Two adults and three children must pay $ 57.&#8      Log On


   

Question 1108649: Jen Butler has been pricing​ Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $ 80Two adults and three children must pay $ 57.  Find the price of the​ adult's ticket and the price of a​ child's ticket.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
a adult price
c child price
system%283a%2B4c=80%2C2a%2B3c=57%29
-
%283a%2B4c%29-%282a%2B3c%29=80-57
a%2Bc=23


Now try the system instead, system%282a%2B3c=57%2Ca%2Bc=23%29.
Start with Elimination Method.