Answer: 3 rose bushes
Explanation:
1. First we must identify the unknown. We do not know how many rose bushes he can get, we will use "x" to represent this number.
2. We must set up an equation with the given information. We know the delivery fee will remain constant.
3. 15+18.75(x)=80
4. Subtract 15 from both sides and it leaves you with 18.75x=65
5. Then you must divide both sides by 18.75, which leaves you with x=3.46
6. We cannot buy .46 of a plant so we must round down to 3
7. Jim can buy 3 rose bushes