the total length of 4 blue banners and 5 yellow banners is 49 meters. the total length of 2 blue banners and 1 yellow banner is 17 meters all banners of the same color have the same length. find the length of each blue banner.

Answer 1

4B+5Y=49
2B+1Y=17

multipy the second equation by 2, and subtract.
3Y=15
y=5
then B=6

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