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AEB047 Group Title

How do you find a b and c for a=-b+3 a+2c=10 -b+c=3

  • one year ago
  • one year ago

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  1. jim_thompson5910 Group Title
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    Solve -b+c=3 for c to get c = b+3

    • one year ago
  2. jim_thompson5910 Group Title
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    Now plug a = -b+3 into the second equation to get a+2c=10 (-b+3)+2c=10 -b+3+2c=10 Then plug in c = b+3 to get -b+3+2c=10 -b+3+2(b+3)=10 Solve this last equation for b. Tell me what you get.

    • one year ago
  3. AEB047 Group Title
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    What do you plug c=b+3 into?

    • one year ago
  4. jim_thompson5910 Group Title
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    into -b+3+2c=10

    • one year ago
  5. jim_thompson5910 Group Title
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    notice how I replaced 'c' with b+3

    • one year ago
  6. AEB047 Group Title
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    thanks

    • one year ago
  7. AEB047 Group Title
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    b=1?

    • one year ago
  8. jim_thompson5910 Group Title
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    yes good

    • one year ago
  9. jim_thompson5910 Group Title
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    you can now use this to find 'a' and 'c'

    • one year ago
  10. AEB047 Group Title
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    a=2

    • one year ago
  11. AEB047 Group Title
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    c=4

    • one year ago
  12. jim_thompson5910 Group Title
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    good

    • one year ago
  13. jim_thompson5910 Group Title
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    all 3 are correct

    • one year ago
  14. AEB047 Group Title
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    thanks!

    • one year ago
  15. jim_thompson5910 Group Title
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    yw

    • one year ago
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