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6 March, 11:28

If x + y = 28 and x - y = - 4, then find the numerical value of y

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Answers (2)
  1. 6 March, 11:31
    0
    Solve simultaneously! use elimination method.

    x+y=28

    -

    x-y=-4

    =0x+2y=32

    2y/2=32/2

    y=16
  2. 6 March, 11:36
    0
    12+16=28

    12-16 = - 14

    Therefore y = 16
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