4 footballs and 4 volleyballs cost $240. 3 footballs and 5 volleyballs cost $234. What is the cost of a football? What is the cost of a volleyball?
:D :D :D
no problemo
4F + 4V = 240 divide through by 4 ⇒ F + V = 60 ⇒ F = 60 - V (1)
3F + 5V = 234 (2)
Sub (1) into (2) for F
3 ( 60 - V) + 5V = 234
180 - 3V + 5V = 234
2V = 234 - 180
2V = 54
V = 54 / 2 = 27 (dollars)
+129 
