Work Step by Step
Let $x$ be the number of roses, then the number of canatations is $20-x$, thus the total cost is: $3x+1.5\cdot(20-x)=39\\3x+30-1.5x=39\\1.5x=9\\x=6$ Thus we have $6$ roses and $20-6=14$ carnatations.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.