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Mathematics 21 Online
OpenStudy (anonymous):

If the perimeter of the triangle is 49 m, find the third side of the triangle http://static.k12.com/eli/bb/811/7537/0/2_36612_44211/7537/de4fd5c32d2dcd9f9fe46f2678920b8306c3d26c/media/c58157d2a33851ad8479a053991aba616be72989/mediaasset_650662_1.gif

OpenStudy (anonymous):

if you call the third one with x; x +9 +18 = 49 x= 49 -18 -9 = 22

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