Find x & AC

Discussion in 'Geometry and Trigonometry' started by nycmathguy, Sep 19, 2021.

  1. nycmathguy

    nycmathguy

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    Elementary College Geometry
    Question 3 Page 7

    20210918_193029.jpg

    AB = BC

    3(x - 15) = x + 3

    3x - 45 = x + 3

    3x - x = 3 + 45

    2x = 48

    (1/2)(2x) = (1/2)(48)

    x = 24

    AC = AB + BC

    AC = 3(x - 15) + x + 3

    Let x = 24

    AC = 3(24 - 15) + 24 + 3

    AC = 3(9) + 27

    AC = 27 + 27

    AC = 54
     
    nycmathguy, Sep 19, 2021
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  2. nycmathguy

    MathLover1

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    correct
     
    MathLover1, Sep 19, 2021
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  3. nycmathguy

    nycmathguy

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    I will post from different courses every now and then to keep the basics fresh in my mind.
     
    nycmathguy, Sep 19, 2021
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