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1 June, 05:07

X=5y+41

X+3y=-15

Substitution method

+5
Answers (2)
  1. 1 June, 07:13
    0
    you substitute 5y+41 for x and get 5y+41+3y=-15 then you simplify by doing 8y+41=-51 subtract 41 from each side and divide by 8 to get y alone. That's how you get 11.5 for your answer.
  2. 1 June, 09:01
    0
    X = 5y + 41

    x + 3y = - 15

    (5y + 41) + 3y = - 15

    (5y + 3y) + 41 = - 15

    8y + 41 = - 15

    - 41 - 41

    8y = - 56

    8 8

    y = - 7

    x = 5 (-7) + 41

    x = - 35 + 41

    x = 6

    (x, y) = (6, - 7)
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