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    I have worked out

    6x - 2y = 33
    4x + 3y = 9

    to be x = 4.5 and y = -3

    What I want to know is say if the first two numbers in each equation had different signs say 6x is -6 instead and then the 4x remains positive. How would I do this then?

    Would I need to add the two equations together still?
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    (Original post by JackT2000)
    I have worked out

    6x - 2y = 33
    4x + 3y = 9

    to be x = 4.5 and y = -3

    What I want to know is say if the first two numbers in each equation had different signs say 6x is -6 instead and then the 4x remains positive. How would I do this then?

    Would I need to add the two equations together still?
    Almost nothing changes when you are dealing with a negative number.

    It is not clear exactly how you did it this time but for example you could multiply the second equation by 1.5 (6/4) and add them together, or multiply by -1.5 then take the first away from the second (both of which are identical anyway)
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    (Original post by JackT2000)
    I have worked out

    6x - 2y = 33
    4x + 3y = 9

    to be x = 4.5 and y = -3

    What I want to know is say if the first two numbers in each equation had different signs say 6x is -6 instead and then the 4x remains positive. How would I do this then?

    Would I need to add the two equations together still?
    Yes, everything must still be done the same. The only difference is, you multiply the 2nd equation by -6 as opposed to 6. You still have to add the equations.

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