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Write an equation and solve it to find the length of the longest side of the triangle. 128x + 150 = 450; x = 2.34 cm x + 278 = 450; x = 172 cm 2x + 278 = 450; x = 86 cm 150x + 128 = 450; x = 2.15 cm

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herrnamelittyshay

128 + 150 + x = 450  

278 + x = 450  

x = 450 - 278  

x = 172. Makes a heck of a lot more sense to me than 2.15

Hope this helps

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