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One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

This is what I have so far:
x+y+12=39

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3 answers

  1. You just have an extra variable.

    x = the smaller number
    x + 12 = the larger number

    Now, write the equation according to the sentence "the sum of the..." and solve.

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  2. This is how I worked it:
    n+12=m
    n=m+12

    m=5
    m=17

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  3. I don't see how you got the answer from that, unless you guessed and checked. Your answers are correct by plugging them into the sentence.

    I would have written this equation and then solved:

    x + 2(x+12) = 39

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