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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 :

Let B represent the length of one blue banner and Y represent the length of one yellow banner.

4B+5Y=49 meters so...
5Y=49-4B
Y=(49-4B)/5

2B+1Y=17 meters
2B+(49-4B)/5 =17
10B+49-4B=85
6B+49=85
6B=36
B=6 meters !!

Hope that makes sense(:

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