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Algebra

posted by on .

use elimination to solve this problem
x +8y = 3
4x - 2y = 7

  • Algebra - ,

    first one times 4 ----> 4x + 32y = 12
    keep the the 2nd ----> 4x - 2y = 7
    subtract them

    34y = 5
    y = 5/34
    sub into original first
    x + 8(5/34) = 3
    x = 3 - 40/34 = 31/17

    x = 31/17 , y = 5/34

    ( checked the answer)

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