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Math Help - help me please

  1. #1
    Newbie
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    help me please

    x+y=12
    x+y=2
    X=

    4x-27=10
    5x+y=14

    17x+2y=42
    18+ 2= 2

    9x-5y= -18
    3x-14 = 6

    try different way additon methond

    some doesnt come out right can you help
    thank you

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  2. #2
    MHF Contributor
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    Talking

    Quote Originally Posted by daisyreyesr View Post
    try different way additon methond
    Does this mean that you are required to use "substitution" or some other particular method(s) for these exercises?

    Quote Originally Posted by daisyreyesr View Post
    some doesnt come out right
    Does this mean that you have obtained the correct solutions to some of the above, but not to others? If so, with which are you requesting assistance? And what were your steps and solutions?

    Please be complete. Thank you!
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  3. #3
    Tau
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    4x-27=10
    5x+y=14
    If we take away 27 from four 'x' we got 10 left.
    One thing we can do in a expression like this is to add a number to both sides.

    so lets add 27

    4x - 27 + 27 = 10 + 27

    remember that we must do the same thing on both sides of the '='

    We can do anything, add, substract, divide, multiply, as long as we do it on both sides and don't break any rules (but let's leave that).
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