7) Janelle is planning a birthday party for her sister she bought 5 rolls of streamers and 3 bags of
balloons for $18.50. She realized while decorating that this was not going to be enough, so she went
back to the store and bought 1 roll of streamers and 2 bags of balloons for $6.50. How much do the
streamers cost and how much do the balloons cost?