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March 30, 2017

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Hannah and francine have $120. Hannah and peter have $230. Peter has 6 times as much money as francine. How much money does hannah have?

  • math - ,

    Francine has $X.
    Peter has $6X.
    Hannah hss $Y.

    Eq1: X + Y = 120.
    Eq2: 6X + Y = 230.
    Multiply Eq1 by -1 and add the Eqs:
    -X + -Y = -120
    6X + Y = 230
    Sum: 5x = 110,

    X = $22.
    X + Y = 120,
    Y = 120 - X = 120 - 22 = $98.

  • math - ,

    DON'T KNOW

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