Algebra

Your teacher is giving you a test worth 100 points containing 40 questions. There are 2-point and 4-point questions on the test. How many of each type are there.

dealing w/-subst. and elimin.

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  1. let number of 2 pointers be x, then number of 4pointers is y

    so x+y = 40
    2x + 4y = 100

    take it from there

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