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Wolf Lord
Lv 5
Wolf Lord asked in Science & MathematicsMathematics · 7 years ago

Fractions help?

2/7=9/x

3 Answers

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  • Robert
    Lv 6
    7 years ago

    2/7 = 9/x If two fractions are equal, their reciprocals are equal:

    7/2 = x/9

    x = (7/2)*9 = 63/2

  • Iggy Rocko
    Lv 7
    7 years ago

    2/7 = 9/x

    x(2/7) = x(9/x)

    2x/7 = 9

    7(2x/7) = 7(9)

    2x = 63

    2x/2 = 63/2

    x = 63/2

  • and I think ...
    7 years ago

    x=(9x7)/2=63/2=31.5

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