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tres ninos school

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exploring mathematics elementary algebra....the sum of the digits of a two-digit number is 12. the value of the number is equal to 11 times the tens digit. find the number.

  • Math - ,

    Assistance needed.

  • tres ninos school - ,

    let the unit digit be x
    let the tens digit be y
    so the "value" of the two digit number is 10y + x

    and then you said:
    10y + x = 11y
    x = y
    but we also know x+y = 12

    mmmh? Can you think of two numbers that are equal and add up to 12 without doing the algebra?

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