Problem Solving

Carl is trying to find a combination. It's written in a riddle. Find 2/3 of the final number, add 16, and this number will equal two times the mystery number. What was the final number of the combination?

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  1. let the "mystery number" be x
    Now just translate the English into math:

    "Find 2/3 of the final number, add 16, and this number will equal two times the mystery number" ------>

    (2/3)x + 16 = 2x

    solve this little equation to get x=12

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