Quantitative Reasoning

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  • PE1.12
  • March 4, 2015 at 2:07 pm #29677

    Ezra Halleck
    Participant

    12. Solve
    x + 2y = – 4
    2x – y = 7
    using the addition method

    March 27, 2015 at 2:49 pm #29989

    MirandaH
    Participant

    so I change the 2nd equation into 4x-2y=14 to cancel out y and find x which was 2 so then i plug x in which was 2 and found y which is -3. so my final answer is (2,-3). And to make sure its the right answer i just plug in x and y into the first equation and make sure it equal to -4 and i was right.

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