radiant edge
Frank runs a balloon shop and buys some new red and green balloons. The red balloons cost him 12 cents each, but he can sell them for 40 cents. In contrast, the green balloons cost him 15 cents each, and he can sell them for 30 cents. If his total cost is $1.80 and he receives $4.40 in revenue, how many green balloons did he buy?
desert drift