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Simultaneous equations??!! :( Watch

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    4x-2y=2
    3x+y=14


    I am literally so confused
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    (Original post by questioner...)
    4x-2y=2
    3x+y=14


    I am literally so confused
    Can you see a way to eliminate one of the variables? (Get rid of either x or y)
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    (Original post by questioner...)
    4x-2y=2
    3x+y=14


    I am literally so confused
    If you are confused over this much in maths you should really go and ask your teacher.
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    rearrange to get what y= in the 2nd equation
    sub it into the first equation
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    4x - 2y = 2
    6x + 2y = 28 Multiply second equation so coefficient of y is equal
    10x = 30 Add the first equation and the equation that you have doubled to get rid of the ys
    x = 3 Solve for x
    9 + y = 14 Substitute back in and solve for y
    y = 5
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    You're asking a lot of these questions, maybe better to make one thread with everything you don't understand.

    Also to everyone answering, don't give the answer. Explain the process and provide an example but don't give the full working. You're giving away work for free which won't help

    To solve simple simultaneous rearrange one of the equations to make X or Y the subject. You can then substitute the equation into the second equation. So for example if you had:

    x+y=3
    2x+2y=6

    rearrange the first equation to get x = 3-y, then substitute that in place of x in the second equation.

    2(3-y) + 2y = 6

    Expand and simplify to get a value for y which you can then use to work out x.
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    (Original post by KhaleesiStorm)
    If you are confused over this much in maths you should really go and ask your teacher.
    I second this. At A Level this stuff shouldn't be an issue, if it is you need to discuss it with a teacher.
 
 
 
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