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anonymous

  • 5 years ago

will someone work this problem out with me solve by substitution method 4m+n=27 m-5n=54 im stuck and dont know what to do next

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  1. anonymous
    • 5 years ago
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    m= 54+5n put in the first eq

  2. anonymous
    • 5 years ago
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    4(54+5n)+n=27

  3. anonymous
    • 5 years ago
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    21n=27-216=-189 n=-9 m=54+5(-9)=54-45=9

  4. anonymous
    • 5 years ago
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    i was taught n=27-4m m-5(27-4m)=54 m-135+20m=54 this is where i got stuck

  5. anonymous
    • 5 years ago
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    21m=54-135=-81 m = -81/21

  6. anonymous
    • 5 years ago
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    ahhh....we must get the same values of m and n....i guess i have done some mistake earliear:S

  7. anonymous
    • 5 years ago
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    oh yess got my mistake

  8. anonymous
    • 5 years ago
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    20n=-189

  9. anonymous
    • 5 years ago
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    can't you answer it with simultaneous equations?

  10. amistre64
    • 5 years ago
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    21m = 54+135...

  11. anonymous
    • 5 years ago
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    yup :)

  12. anonymous
    • 5 years ago
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    off course we can do, but ann wanted by the substitution method

  13. amistre64
    • 5 years ago
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    missmys; there are alot of ways to solve it :)

  14. anonymous
    • 5 years ago
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    oh, ok :)

  15. amistre64
    • 5 years ago
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    the trick is trying to fit thru the right hoops at the right times for tinas teacher.... hes a tyrant ;)

  16. anonymous
    • 5 years ago
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    yes he is

  17. anonymous
    • 5 years ago
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    XD

  18. anonymous
    • 5 years ago
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    ty everyone

  19. anonymous
    • 5 years ago
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    quick question why does the 20m change to 21m?

  20. amistre64
    • 5 years ago
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    20m + m = m(20+1) = 21m

  21. anonymous
    • 5 years ago
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    m+21m=21m

  22. anonymous
    • 5 years ago
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    coefficients are added up

  23. anonymous
    • 5 years ago
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    oh ok i missed that part

  24. amistre64
    • 5 years ago
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    if you ahve 20 apples on the counter and 1 apple on the table; how many apples you got all together? :)

  25. anonymous
    • 5 years ago
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    lol

  26. amistre64
    • 5 years ago
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    uzma..... m+21m = 21m lol....youre funny :)

  27. amistre64
    • 5 years ago
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    so apparently i need a letter of recomendation to go to a 4 year college...

  28. amistre64
    • 5 years ago
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    who is sposed to writ eit?

  29. anonymous
    • 5 years ago
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    anyone that is in a professional state, like a guidence consular or someone like that

  30. anonymous
    • 5 years ago
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    UR MENTOR!!

  31. anonymous
    • 5 years ago
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    or form tutor

  32. amistre64
    • 5 years ago
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    i mentor myself lol

  33. anonymous
    • 5 years ago
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    ??? i have a mentor at school but she only mentored me once pointless really :) what about form tutor then?

  34. amistre64
    • 5 years ago
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    whats a form tutor?

  35. amistre64
    • 5 years ago
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    at 40...there isnt much more that i can be mentored or tutored in ;)

  36. anonymous
    • 5 years ago
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    wait, do you go to a school? cause in our school we have our mentor and form tutor write those things

  37. anonymous
    • 5 years ago
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    form tutor just someone to talk to whenever you need it, but we have to go everyday and its pointless if you have no problems and you do discussions and stuff

  38. anonymous
    • 5 years ago
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    amistre64 is the tutor! or atleast for me when hes available he has never been wrong

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