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eli123

  • 3 years ago

inverse of 9x+3 over x+3?

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  1. amistre64
    • 3 years ago
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    swap x and y and solve for y

  2. amistre64
    • 3 years ago
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    9x+3 y = ------ x+3 inverse is: 9y+3 x = ------ y+3 solve for "y" to get it looking "proper"

  3. anonymous
    • 3 years ago
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    you know how to solve for \(y\)?

  4. eli123
    • 3 years ago
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    multiply both side by y+3?

  5. anonymous
    • 3 years ago
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    that is a good first step, yes \[x(y+3)=9y+3\] next step is to multiply out on the left of the equal sign

  6. eli123
    • 3 years ago
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    but then you are going to have xy?

  7. amistre64
    • 3 years ago
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    xy is fine, its only a step in the process

  8. amistre64
    • 3 years ago
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    xy + 3x = 9y + 3 get all the y parts to one side and everything else to the other so that we can factor out a common y

  9. eli123
    • 3 years ago
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    x(y+3)=3(y+1)

  10. eli123
    • 3 years ago
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    i mean 3(3y+1)

  11. amistre64
    • 3 years ago
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    xy + 3x = 9y + 3 xy - 9y = 3 - 3x y(x - 9) = 3 - 3x and divide off the x-9

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