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Home > MC1 > Chapter 1 > Lesson 1.1.2 > Problem 1-15


Maria's brother came back with another problem. He said, "If you multiply my number by and add you get ."

  1. What number was he thinking of?

    Having trouble? Go back and look at the 1-14, because that problem is very similar to this one.
    Remember to pick a reasonable number and use it to do the steps that Maria's brother describes.

  2. Explain how you figured out your answers to Maria's and her brother's number puzzles.

    Did you guess and then check whether your guess worked?
    Did you work backwards?