A school club sold 220 T-shirts for a fundraiser. Adult-size shirts cost $20 each and child-size shirts cost $15 each. The total collected for all the T-shirts sold was $3,550.How many adult-size T-shirts were sold?
Accepted Solution
A:
{20a+15c=3550 {a+c=220
{20a+15c=3550 {15a+15c=3300 5a=250 a=50 There are 50 adult-size T-shirts were sold