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if a number x is 10%of y and z,and z is 3 times of y.What % is x of y alone? 1)3.3% 2)2.5% 3)5% 4)4%

  • math -

    z = 3y

    x = .1(y+z) = .1(y+3y) = .1(4y)

    Take it from there.

  • math -

    i don't understand what is x of y alone ,

  • math -

    It is the relationship of x to y with z factored out.

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