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anonymous

  • 4 years ago

4x + y = -1 3x + 2y = 8

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  1. anonymous
    • 4 years ago
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    Are these two seperate equation?

  2. anonymous
    • 4 years ago
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    I don't think so, I have to find the points for the graph.

  3. anonymous
    • 4 years ago
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    Ok

  4. anonymous
    • 4 years ago
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    I have 4x = -1 - 4 (-1 - 4) + 2y = 8 So far but I don't know if I'm doing it right. Or if I am doing it right what to do after that.

  5. anonymous
    • 4 years ago
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    So what we have here is : 4x + y = -1 3x + 2y = 8 So What i think you havta do is solve by elimation So to do this we have to do the following:

  6. anonymous
    • 4 years ago
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    We multiply the equation by its coefiicant

  7. anonymous
    • 4 years ago
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    So: -3(4x+y=-1) 4(3x+2y=8)

  8. anonymous
    • 4 years ago
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    Can u Solve that?

  9. anonymous
    • 4 years ago
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    I can try.

  10. Mertsj
    • 4 years ago
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    Here is a more sensible approach. From the first equation, y = -1-4x Replace y in the second equation with -1-4x

  11. Mertsj
    • 4 years ago
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    \[3x+2(-1-4x)=8\]

  12. Mertsj
    • 4 years ago
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    \[3x-2-8x=8\]

  13. Mertsj
    • 4 years ago
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    \[-5x=10\]

  14. Mertsj
    • 4 years ago
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    \[x=-2\]

  15. Mertsj
    • 4 years ago
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    \[y=-1-4x\]

  16. Mertsj
    • 4 years ago
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    \[y=-1-4(-2)=-1+8=7\]

  17. Mertsj
    • 4 years ago
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    Solution is (-2,7)

  18. anonymous
    • 4 years ago
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    Could I email you the graphs I can choose from to see which one would be correct? and thank you!

  19. anonymous
    • 4 years ago
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    Never Mind I think I know which one is right!

  20. Mertsj
    • 4 years ago
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    ok

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