Algebra 2 Home work help!!?

Please show me how you got the answer:

Solve each system by substitution:

29. -x - 4y = 3

x + 5y = 5

30. 8x + 7y = 9

y = -1

Thank you!

2 Answers

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  • Anonymous
    9 years ago
    Favorite Answer

    -x-4y=3

    x+5y=5....subtract 5y

    x=5-5y.....plug this into one of the originals

    -(5-5y)-4y=3...distribute the -1

    -5+5y-4y=3...add 5 to both sides

    5y-4y=8...combine like terms

    y=8....plug this in for y

    -x-4(8)=3

    -x-32=3

    -x=35

    x=-35

    (-35,8)

    do same for number 30

  • Anonymous
    9 years ago

    -5+5y-4y=3

    y=8 so

    x+40=5

    x=-35

    8x-7=9

    8x=16

    x=2 y=-1

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