Alaina is selling wreaths and poinsettias for her chorus fundraiser. Wreaths cost $27 each poinsettia cost $20 each. If she sold 15 poinsettias and made $543, how many wreaths did she sell?
9 because if each poinsettia is $20 and she sold 15 she made $300 on the poinsettia. 543-300=243 so she made $243 on the wreaths and each reath costs $27 so 243÷27=9