4th grade math

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Rodney is three times as old as his sister. Ayear ago he was four times as old. How old are rodney and his sister now?

  • 4th grade math -

    R=3S

    R-1=4(S-1)

    Does that help?

  • 4th grade math -

    3 x 3 = 9

    2 x 4 = 8

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