Posted by ANNIE on Wednesday, February 27, 2013 at 8:46pm.
For a fundrasier, the Best Buddies club sold tshirts. The adult shirts were $15 per shirt and the youth shirts were $12 per shirt, and they made a total of $330 on the shirts. If they sold a total of 26 shirts, how many of each did they sell?
I don't understand this, so please show work.

math  PsyDAG, Wednesday, February 27, 2013 at 8:57pm
A + Y = 26, so Y = 26  A
15A + 12Y = 330
Substitute 26A for Y in second equation and solve for A. Insert that value into the first equation and solve for Y. Check by inserting both values into the second equation. 
Need more help  NEED HELP, Wednesday, February 27, 2013 at 9:38pm
I don't understand the substitute part.