Math

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How do you do this Simultaneous Equation?
3x+4y=14
x+y=3

Please give me the step by step solution.

Thanks a lot!

  • Math -

    3x+4y=14 (1)
    x+y=3 (2)
    Multiply (2) by -3 to get the x's to cancel.
    3x+4y=14 (1)
    -3x-3y=-9 (3)
    Add (1) and (3) together.
    y=5
    Replace y=5 in either original equation (1) or (2) to solve for x.

  • Math -

    Now, I understand. Thanks, Jen!

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