Algebra

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this december your brother jack will be 2 years from being twice as old as your sister Jen. the sum of jacks age and three times jens age is 68. how old is jen?

  • Algebra -

    Jack's age=2*(Jen's age)-2
    [Jack's age]+3*(Jen's age)=68

    use substitution method:
    [2*(Jen's age)-2]+3*(Jen's age)=68
    Solve for Jen's age.

  • Algebra2 -

    how to solve a matrice when it's like b21 and it givec you to sets of matrices like AND IT SAYS TO ID EACH ELEMENT
    A.)O -1 B.)6 -3 1/2
    1.5 3 AND
    7 -2

  • Algebra -

    Jen's age = X yrs.
    Jack's age = (2X -2) YRS.

    (2X - 2) + 3X = 68,
    2X + 3X -2 = 68,
    5X = 68 + 2 = 70,
    X = 14 yrs. = Jen's age.

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