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algebra

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could someone please help solve by substitution 8x-3y=-88
4x+48=y

  • algebra -

    8 x - 3 y = -88

    8 x - 3 (4 x + 48) = -88

    8 x - 12 x - 144 = -88

    -4 x = 56

    x = -14

    then get y

  • algebra -

    x 30 sec or .5 min
    y 60 sec or 1 min

    x + y = 14

    .5 x + y = 11
    ---------------- subtract
    .5 x + 0 y = 3
    x = 6
    y = 14-x = 8
    ----------------------------
    ----------------------------
    check
    6*.5 + 8 = 3+8 = 11

  • By the way -

    Post new questions as new questions, not under your old one. Otherwise they will be missed.

  • algebra -

    Sorry, Damon. I removed her question here while you were answering it. I've reposted your answer above.

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