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14-04-2020
Mathematics

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The lengths (in meters) of two sides of a regular triangle are represented by the expressions 3x-5 and x+9. Find the length of a side of the triangle

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14-04-2020

I'll assume regular means equilateral, equal sides, so

3x - 5 = x + 9

2x = 14

x = 7

side = x+9 = 16

check 3x-5 = 21-6 = 16, good

Answer: 16

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