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23 March, 01:30

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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  1. 23 March, 04:53
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    Since all the sides add up to 10x+2, that means that 10x-2--=. Plugging it in, we have 10x-2-5x - (2x+9) = side3, and 5x-2 - (2x+9) = side3, then expanding it to 5x-2-2x-9=3x-11=side3
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