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anonymous

  • one year ago

Two equations are given below: a − 3b = 4 a = b − 2 What is the solution to the set of equations in the form (a, b)? (−2, −2) (−3, −1) (−9, −7) (−5, −3)

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  1. anonymous
    • one year ago
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    @Sachintha

  2. anonymous
    • one year ago
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    @pooja195

  3. anonymous
    • one year ago
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    @happyrosy

  4. anonymous
    • one year ago
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    do you know substitution method?

  5. anonymous
    • one year ago
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    no

  6. anonymous
    • one year ago
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    you already have a= b-2 Substitute that for a

  7. anonymous
    • one year ago
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    a -3b = 4 --> b - 2 -3b = 4

  8. anonymous
    • one year ago
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    -2b - 2 = 4 -2b = 6 b = -3

  9. anonymous
    • one year ago
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    okay so is it B

  10. anonymous
    • one year ago
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    Substitute b in any of your 2 original equations

  11. anonymous
    • one year ago
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    No it isn't b. Remember it is in the form of (a, b)---> (a, -3)

  12. anonymous
    • one year ago
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    Answer is D i believe

  13. anonymous
    • one year ago
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    THANKS! @claringleek

  14. anonymous
    • one year ago
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    :)

  15. anonymous
    • one year ago
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    a − 3b = 4 a = b − 2 We are going to have to substitute -3 for b. Let's choose the second equation because it is shorter. a = -3 - 2, which means a = -5 So, ( -5, -3) is your answer which is D

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