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21 December, 12:30

6 16x + 5y = - 2

4x - y=-2

+1
Answers (1)
  1. 21 December, 15:08
    0
    x=2/9, y=26/9

    Step-by-step explanation:

    This is a simultaneous equation

    16x+5y=-2 ... (1)

    4x-y=-2 ... (2)

    From (2) make y the subject of formula

    y=4x+2 ... (3)

    Substitute (3) into (1)

    16x+5 (4x+2) = -2

    16x+20x+10=-2

    36x-10=-2

    Add 10 to both sides

    36x=8

    Divide both sides by 36

    x=8/36

    Divide both denominator and numerator by 4

    x=2/9

    Substitute the value x into (3)

    y=4 (2/9) + 2

    y=8/9+2

    Let the LCM be 9

    y=8+18/9

    y=26/9

    Therefore x=2/9, y=26/9
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