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A number X is 3 times greater than the number Y, and Y is 3 times greater than Z. If the sum of Y and Z is equal to 50, what is the value of X?

Please show working out, thanks.

  • math -

    Just translate ...

    x = 3y , and y = 3z

    y+z = 50
    3z + z = 50
    4z = 50
    z = 25/2 or 12.5

    then y = 3z = 3(12.5) = 37.5
    x = 3y = 3(37.5) = 112.5

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