st. charles borremeo

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maria practiced for 40 minutes on sat. she practiced 10 minutes less in the morning the in the afternoon? how many minutes did she practice in the afternoon

  • st. charles borremeo -

    M + A=40
    but M-10=A
    so
    M+M-10=40
    add ten to each side
    2M=30
    morning=15min, afternoon 25min

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