5 Consider this system of equations: 5x + y = -2 2x – 2y=4

Question

5 Consider this system of equations:
5x + y = -2
2x – 2y=4

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Amity 6 months 2021-08-05T17:13:59+00:00 1 Answers 14 views 0

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  1. Edana
    0
    2021-08-05T17:15:21+00:00
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    Answer:

    x  = 0

      y  = -2

    Step-by-step explanation:

    The given system of equation are:

       5x + y = -2

       2x – 2y = 4  

    The problem here is to find x and y from the expression

       5x + y = -2     —– i

       2x – 2y = 4    —- ii

     So;

    i x 2 :  10x + 2y  = -4     —-  iii

    ii x 5 :  10x – 10y  = 20    —– iv

       iii – iv;   12y  = -24

                      y  = -2

        Now find x;

                 5x + y  = -2

                 5x  – 2  = -2

                      x  = 0

     

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )