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21 May, 15:30

1. Solve the system using substitution

x+y=8

y=3x

A. (4,12)

B. (2,6)

C. (1/2,2/3)

D. (-4,-12)

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Answers (1)
  1. 21 May, 15:59
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    X+y=8

    y=3x

    You would want to substitute the y for the 3x

    x+3x=8

    You can now add the x with the 3x to get 4x

    4x=8

    Now divide the 4 on both side to solve for x

    x=2

    Now to solve for y just substitute the x for the 2

    y=3 (2)

    Now multiply the 3 and the 2 to solve for y.

    y=6

    So your corrct answer is B: (2,6)
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