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Math Help - simulataneous equations HELP!!

  1. #1
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    Exclamation simulataneous equations HELP!!

    Does any one know how to successfully complete simulataneous equations I have been trying to solve this one for ages and just cant do it is stressing me out

    3p1-4p1=57
    2p1+2p2-10=0

    I'd appreciate any help
    thanks
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  2. #2
    Member great_math's Avatar
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    Quote Originally Posted by smelly1 View Post
    Does any one know how to successfully complete simulataneous equations I have been trying to solve this one for ages and just cant do it is stressing me out

    3p1-4p1=57
    2p1+2p2-10=0

    I'd appreciate any help
    thanks
    I think there is an typo..It should be

    3p1-4p2=57---------[1]
    2p1+2p2-10=0-------[2]

    Here is the solution:

    Multiply 2 in equation [2]

    Now we have;


    3p_1-4p_2=57---[1]
    4p_1+4p_2=20--[2]

    Add them...

    7p_1=77
    p_1=11

    Substitute in [1]

    We have -4p_2=24
    p_2=-6

    So p_1=11 and p_2=-6
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  3. #3
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    Smile Thankyou

    Thanks for your help thats great
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