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March 30, 2017

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solve this system of equations and solve for triple pair:
x+y+z=8
2y+4y+2z=26
-x+8y-3z=26

  • ALGEBRA - ,

    I think your second equation is probably
    2x+4y+2z=26

    add the first and third ---> 9y - 2z = 34 (#1)

    multiply third by 2
    -2x + 16y - 6z = 52
    add that to the second
    20y -4z = 78
    10y - 2z = 39 (#2)

    #2 - #1 : ----> y = 5
    sub into #1
    45 - 2z = 34
    -2z = -11
    z = 5.5

    back into the first
    x + 5 + 5.5 = 8
    x = -2.5

    x = -2.5
    y= 5
    z = 5.5

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