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25-09-2017
Mathematics

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A triangle has a perimeter of 10x+2. Two sides have lengths of 5x and 2x+9. What is the length of the 3rd side

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choixongdong choixongdong

25-09-2017

length of third side = 10x + 2 - (5x + 2x + 9)
length of third side = 10x + 2 - (7x + 9)
length of third side = 10x + 2 - 7x - 9
length of third side = 3x - 7

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