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triangles

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The measures of two of the sides of an equilateral triangle are 3x + 15 in. and 7x – 5 in. What is the measure of the third side in inches?

  • triangles -

    3x + 15 = 7x - 5

    20 = 4x

    5 = x

  • triangles -

    Ya gotta watch out for Ms. Sue; she's a sly one. Notice how she solved for x, but she left it up to to actually answer the question!

    :-)

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