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8 November, 01:54

X+4y=30 system by substitution

X-2y=0

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Answers (1)
  1. 8 November, 02:51
    0
    x=10, y=5

    Step-by-step explanation:

    For substitution, you always want to get the variable alone. The second equation (x-2y=0) will be easier to substitute into the first equation.

    x-2y=0

    x=2y

    You can substitute 2y as x on the first equation (x+4y=30).

    2y+4y=30

    6y=30

    y=5

    Plug y=5 into any equation.

    x+4 (5) = 30

    x+20=30

    x=10
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