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14 April, 06:27

X+y=-13 and 4x+6y=-72

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Answers (2)
  1. 14 April, 06:53
    0
    x=-3

    y=-10

    Step-by-step explanation:

    X+y=-13 Equation 1

    4x+6y=-72 Equation 2

    Using substitution method

    Make x the subject in equation 1

    X=-13-y Equation 3

    Substitute for x in equation 2

    4x+6y=-72

    4 (-13-y) + 6y=-72

    -52-4y+6y=-72

    -52+2y=-72

    2y=-72+52

    2y=-20

    y=-20/2

    y=-10

    Substitute y for - 10 in equation 1

    X+y=-13

    X-10=-13

    x=-13+10

    x=-3
  2. 14 April, 07:37
    0
    for x+y is 7+6or 6+7 for 4x+6y is 36+36
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