math

Solve the following system of equations using matrices
x = -2y + 6
2x + 2y = 16

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asked by kailin
  1. 1 2 6
    1 1 8

    1st - 2nd

    1 2 6
    0 1 -2

    1st - 2x2nd

    1 0 10
    0 1 -2

    so x = 10
    y = -2

    (using matrices to solve this simple system is like using a sledge-hammer to crack a peanut.
    Substitution would have been so easy)

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    posted by Reiny

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