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ayee_ciera

  • one year ago

CAN ANYONE HELP ME PLS I WILL FAN AND MEDAL TO ANYONE THT HELPS!

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  1. ayee_ciera
    • one year ago
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    What is the solution to the following system? 3x+=3y=10 -9x-9y=-30

  2. FireKat97
    • one year ago
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    try posting up your working so far

  3. ayee_ciera
    • one year ago
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    I haven't got anything im stuck

  4. FireKat97
    • one year ago
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    okay so when you have questions like these, there are two methods you can go to; substitution method and elimination method do you know how these work?

  5. ayee_ciera
    • one year ago
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    yes ofc

  6. FireKat97
    • one year ago
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    okay so pick whichever one you want to use for this particular question..

  7. ayee_ciera
    • one year ago
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    um.. substitution?

  8. anonymous
    • one year ago
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    i tink de ansa is d :)

  9. anonymous
    • one year ago
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    ( ͡° ͜ʖ ͡°), ( ͠° ͟ʖ ͡°), ᕦ( ͡° ͜ʖ ͡°)ᕤ, ( ͡~ ͜ʖ ͡°). ( ͡o ͜ʖ ͡o), ͡° ͜ʖ ͡ -, ( ͡͡ ° ͜ ʖ ͡ °)

  10. anonymous
    • one year ago
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    wheere's mey medal ?

  11. anonymous
    • one year ago
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    de ansa us d

  12. anonymous
    • one year ago
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    cun i huve my medul?

  13. anonymous
    • one year ago
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    ( ͡° ͜ʖ ͡°), ( ͠° ͟ʖ ͡°), ᕦ( ͡° ͜ʖ ͡°)ᕤ, ( ͡~ ͜ʖ ͡°). ( ͡o ͜ʖ ͡o), ͡° ͜ʖ ͡ -, ( ͡͡ ° ͜ ʖ ͡ °)

  14. anonymous
    • one year ago
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    ( ͡o ͜ʖ ͡o)

  15. FireKat97
    • one year ago
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    okay so if you want to substitute, write either one of the two equations in the form of y = ... or x = ....

  16. ayee_ciera
    • one year ago
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    but how?

  17. FireKat97
    • one year ago
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    okay so say we pick the first equation and want to write it in terms of x... so 3x + 3y = 10 we want to isolate x, do you have any ideas how we may do so?

  18. ayee_ciera
    • one year ago
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    plug in -9x...?

  19. FireKat97
    • one year ago
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    um no, we want x by itself, so we can start off by subtracting 3y from both sides of the equation, to get 3x + 3y - 3y = 10 - 3y and now we simplify..

  20. FireKat97
    • one year ago
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    so we get 3x = 10 - 3y

  21. ayee_ciera
    • one year ago
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    can it also be 3x=3y+10?

  22. ayee_ciera
    • one year ago
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    @FireKat97

  23. FireKat97
    • one year ago
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    no because we subtracted 3y from the right hand side, we didn't add it

  24. FireKat97
    • one year ago
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    because only through subtracting 3y from both sides, could we cancel 3y on the left hand side and try to isolate the x

  25. ayee_ciera
    • one year ago
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    so we divide 10-3y by 3x? @FireKat97

  26. FireKat97
    • one year ago
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    close.. we divide it by 3 alone :)

  27. FireKat97
    • one year ago
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    that way we get x = (10 - 3y)/3

  28. ayee_ciera
    • one year ago
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    \[x=\frac{ 10-3y }{ 3 }\]

  29. ayee_ciera
    • one year ago
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    @FireKat97

  30. FireKat97
    • one year ago
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    yup thats correct! Now we want to substitute this into our second equation and simplify..

  31. ayee_ciera
    • one year ago
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    \[-9(\frac{ 10-3y }{ 3 })-9y=-30\] so tht? @FireKat97

  32. FireKat97
    • one year ago
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    Yup! thats right! now we have to simplify

  33. ayee_ciera
    • one year ago
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    \[-9(\frac{10-3y }{ 3 })-9y=-30\] \[-21y-9y=-30\] \[+9y+9\] -30=-30 @FireKat97

  34. FireKat97
    • one year ago
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    umm let start off by opening and simplifying the brackets first, so just simplify -9(10 - 3y( and tell me what you get

  35. FireKat97
    • one year ago
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    )*

  36. ayee_ciera
    • one year ago
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    -21 @FireKat97

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