Algebra

Ulani has two sisters. Ulanis older sister is twice her age plus one. Her younger sister is 3 years less than ulanis age. What is ulsnis age if their sum of she's equals 26?

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  1. If their ages are
    younger sister: x
    Ulani: y
    elder sister: z

    then we have

    z = 2y+1
    x = y-3
    x+y+z = 26

    (y-3) + y + (2y+1) = 26
    4y-2 = 26
    y = 7

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