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12 October, 17:30

Solve by substitution

4x+2y=10

x-y=13

+4
Answers (2)
  1. 12 October, 17:39
    0
    4x+2y=10

    x-y=13

    x=13+y

    4 (13+y) + 2y=10

    52+4y+2y=10

    52+6y=10

    6y=-42

    y=-7

    x=13+y=13-7=6
  2. 12 October, 17:42
    0
    Equation 1: 4x+2y=10

    Equation 2: X-y = 13

    From Equation 2:

    X = 13+Y

    Substitute X into Equation 1:

    4 (13+Y) + 2Y=10

    52+4Y+2Y=10

    52+6Y=10

    6Y=10-52

    6Y=-42

    Y=-7

    Substitute Y into Equation 2:

    X - (-7) = 13

    X+7=13

    X=6

    Therefore: Y = - 7; X=6
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