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anonymous

  • one year ago

please help me solve this a=x+y+z/3 a. y = a - 3x - z b. y = a - x - 3z c. y = 3a - x - z

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  1. FibonacciChick666
    • one year ago
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    If, a,x and z were numbers, could you find y?

  2. anonymous
    • one year ago
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    \[\frac{ x+y+z }{ 3 } it looks like this

  3. anonymous
    • one year ago
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    |dw:1432755045660:dw|

  4. FibonacciChick666
    • one year ago
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    I assumed from the answer choices that was the problem, but you still have not answered, if a,z, and x were just numbers instead of variables, could you find y?

  5. anonymous
    • one year ago
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    i dont know how

  6. FibonacciChick666
    • one year ago
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    ok, so can you tell me the order of operations?

  7. anonymous
    • one year ago
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    i really know nothing about this thats why i need help

  8. FibonacciChick666
    • one year ago
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    Well, then at least google the order of operations. You should have learned that in 5th or 6th grade.

  9. anonymous
    • one year ago
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    divide is first

  10. FibonacciChick666
    • one year ago
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    I would like to know the whole order, for example, people like to use PEMDAS to remember, can you tell me what each letter stands for?

  11. anonymous
    • one year ago
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    parenthasis exponets multiplication division adition subtraction

  12. FibonacciChick666
    • one year ago
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    alright, so it is important to remember the order of operations because when you solve for a variable, you just reverse it. So we will do SadMep

  13. FibonacciChick666
    • one year ago
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    So, first we write what the question actually means \[a=\frac{(x+y+z)}{3}\] Now, we reverse the order of operations and ask ourselves, is there any subtraction?

  14. anonymous
    • one year ago
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    no subtraction

  15. anonymous
    • one year ago
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    there is addition

  16. FibonacciChick666
    • one year ago
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    but it is inside parentheses right? So we have to wait

  17. FibonacciChick666
    • one year ago
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    so now, keep going, what comes after addition when we reverse the order of ops?

  18. anonymous
    • one year ago
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    divition

  19. FibonacciChick666
    • one year ago
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    right, so what is the opposite of division?

  20. anonymous
    • one year ago
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    multiplication

  21. FibonacciChick666
    • one year ago
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    good, so if we are dividing by 3, to undo it, we need to multiply both sides by 3, can you tell me what you get?

  22. anonymous
    • one year ago
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    3a=x+y+z

  23. FibonacciChick666
    • one year ago
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    nice, so now, restart your reversal of the order of ops

  24. FibonacciChick666
    • one year ago
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    any subtraction?

  25. anonymous
    • one year ago
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    no subtraction

  26. FibonacciChick666
    • one year ago
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    so what comes next?

  27. anonymous
    • one year ago
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    adition

  28. FibonacciChick666
    • one year ago
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    is there any?

  29. anonymous
    • one year ago
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    yes x+y+z

  30. FibonacciChick666
    • one year ago
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    ok, so what are we trying to get by itself?

  31. FibonacciChick666
    • one year ago
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    and how do we undo addition?

  32. anonymous
    • one year ago
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    do we subtracts y and z

  33. FibonacciChick666
    • one year ago
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    well, we want y so we will leave it. If we subtracted y and z from bothe sides, we'd find x not y. So what do we need to subtraact from both sides?

  34. anonymous
    • one year ago
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    z and x?

  35. FibonacciChick666
    • one year ago
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    yea, and what do you get?

  36. anonymous
    • one year ago
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    3a=y

  37. FibonacciChick666
    • one year ago
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    no, remember you have to do it to both sides

  38. anonymous
    • one year ago
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    -3?

  39. FibonacciChick666
    • one year ago
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    nah, just write the whole thing out. you are here: \[3a=x+y+z\]

  40. FibonacciChick666
    • one year ago
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    so what are you doing?

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