Betty used a total of 7 purple streamers and silver streamers. Each purple streamer was 2 m long. Each silver streamer was 4 m long. The total length of streamers she used was 24 m. How many silver streamers did she use?
If all the streamers are purple,
total length of streamers
= 7 x 4
= 28 m
Difference between the length of 1 purple streamer and 1 silver streamer
= 4 - 2
= 2
Difference between the length of all the purple streamers and all the silver streamers
= 28 - 24
= 4 m
Number of purple streamers
= 4 ÷ 2
= 2
Number of silver streamers
= 7 - 2
= 5
Answer(s): 5
