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Yuki's age is four years more than one-fourth of Xena's age. Xena's age is 21 years and 6 months more than seven-eighths of Yuki's age. How old are Xena and Yuki?

  • math -

    y = .25x + 4

    x = 7/8y +21.5

    Substitute .25x+4 for y in second equation and solve for x. Insert that value into the first equation and solve for y. Check by inserting both values into the second equation.

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