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Math Help - Using proportions (7th grade math)

  1. #1
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    Using proportions (7th grade math)

    can't figure out the following.

    1.) 2.1/3.5 [] 3/7 - this is equal to or true statement

    2.) r/3.5 = 7.2/9

    solve each proportion

    15/m-2 = 3/14
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  2. #2
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    \frac{15}{m-2} = \frac{3}{14}

    3m - 6 = 210

    3m = 216

    m = 72
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