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    4x-y=11 y=2x-5

    please explain


     

    0  Views: 587 Answers: 2 Posted: 14 years ago

    2 Answers

    4x-y=11 y=2x-5


    4x - 2x -5 = 11  > Put 2x - 5 in place of y


    4x - 2x = 2x


    2x - 5 = 11


    The opposite of subtraction is addition.  Add 5 on both sides.


    2x - 5 = 11


         +5    +5


    --------------------


    2x = 16


    The opposite of multiplication is division. Divide by 2.


    Answer:  x = 8

    Replace y with ( 2x -5) in 4x - y = 11 


    4x - (2x-5) = 11


    4x  - 2x + 5 =11


    2x = 11 - 5


    2x = 6


    x = 6/2 = 3


    replace the x in y = 2x - 5


    y = 2 times 3 - 5


    y = 6 - 5 = 1


    x=3  y=1



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