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March 28, 2017

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Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
11x + 8y = 103
22x – 7y = 68

  • algebra - college - ,

    11x+8y=103 (1)
    22x-7y=68 (2)
    Multiply (1) by -2 to cancel the x's
    -22-16y=-206 (3)
    22x-7y=68 (2)
    Add them together.
    -23y=-138
    Divide by -23
    y=6
    Now substitute y=6 into either equation (1) or (2) to solve for x.
    Post your work and answer if you'd like it checked.

  • algebra - college - ,

    Hi Jen,
    Okay here is what I got to solve for x

    11x *6 + 8y = 72
    66 + 8y
    8y = 9
    x = 9

    Okay did I do this right?

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