Algebra

posted by KG

Jill asks each of her classmates to choose a number, then multiply the number by -3, add 2 to the product, multiply the result by -2, and then subtract 14. Finally, each student is asked to divide the result by 6 and record the answer. When Jill gets an answer from a classmate, she just adds three to it in her head and announces the number that classmate originally chose. How did Jill know to add 3 to each answer?

  1. Damon

    [(-3 x + 2 )(-2) -14 ]/6

    [(6 x - 4 ) -14 ]/6

    [6 x -18 ]/6

    x - 3 write it down

    add three and you get x back :)

  2. Anonymous

    X-3

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