ANSWER:
3 watermelons
STEP-BY-STEP EXPLANATION:
The first thing is to calculate the price per unit of the watermelon, knowing that there are 5 for $2,300, like this:
[tex]\begin{gathered} p=\frac{2300}{5} \\ \\ p=\text{\$}460 \end{gathered}[/tex]Now, we will divide the amount of $1500 by the price, so we get the units of watermelons:
[tex]\frac{1500}{460}=3.26\cong3[/tex]Which means that for $1500 it is possible to buy up to 3 watermelons