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Math Help - Find the sum of x and y

  1. #1
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    Find the sum of x and y

    Okay so I think I know that x and/or y has to be negative.
    But I dont know where to start from.

    An ordered pair of real numbers (x,y) satisfies the equation y = 4 x - 20 but does not satisfy the equation y/( x-5) = 4. In the ordered pair, the value of x = y is:
    a) 5 b)4 c) 20 d) 0 e) 24

    help please ?
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  2. #2
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    Quote Originally Posted by foreverbrokenpromises View Post
    Okay so I think I know that x and/or y has to be negative.
    But I dont know where to start from.

    An ordered pair of real numbers (x,y) satisfies the equation y = 4 x - 20 but does not satisfy the equation y/( x-5) = 4. In the ordered pair, the value of x = y is:
    a) 5 b)4 c) 20 d) 0 e) 24

    help please ?
    I would guess 5 because (x-5)=0 which doesn't work in the denominator. All the others ought to work because it's the same equation
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  3. #3
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    Quote Originally Posted by foreverbrokenpromises View Post
    Okay so I think I know that x and/or y has to be negative.
    But I dont know where to start from.

    An ordered pair of real numbers (x,y) satisfies the equation y = 4 x - 20 but does not satisfy the equation y/( x-5) = 4. In the ordered pair, the value of x = y is:
    a) 5 b)4 c) 20 d) 0 e) 24

    help please ?

    In the ordered pair, the value of x = y

    know that x and y has to be negative/positive


    Simply plug in various values for both equations.
    You have 5 choices for the (x,y) pair.
    Try them all.
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