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coolaidd Group Title

AB and BC are tangent to circle D. Find x if AB=3x+2 and BC=x+12. Find x.

  • one year ago
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  1. coolaidd Group Title
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    • one year ago
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  2. j814wong Group Title
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    From any point outside a circle, only two, equally long tangent lines can be drawn to a circle.

    • one year ago
  3. j814wong Group Title
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    So set the two lengths as equal and solve for x from there

    • one year ago
  4. coolaidd Group Title
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    3x+2=x+12 ?

    • one year ago
  5. j814wong Group Title
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    Yep

    • one year ago
  6. coolaidd Group Title
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    ok..

    • one year ago
  7. coolaidd Group Title
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    add 3x?

    • one year ago
  8. j814wong Group Title
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    You can't add 3x. Your goal to solve for x is to isolate it. To do so, move the term with a variable to one side and the constant to the other. To do so, subtract both sides by x then subtract both sides by 2 and simplify from there to get x completely on it's own.

    • one year ago
  9. j814wong Group Title
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    3x+2=x+12 3x-x+2-2=x-x+12-2 2x=10 x=__

    • one year ago
  10. j814wong Group Title
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    What you do on one side of an equation, you must do on teh other side to keep the equation the as having teh same value. By doing so, you alter the form of teh equation while keeping teh meaning.

    • one year ago
  11. coolaidd Group Title
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    5?

    • one year ago
  12. j814wong Group Title
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    Yeah

    • one year ago
  13. coolaidd Group Title
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    thank you!! :)

    • one year ago
  14. j814wong Group Title
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    Your welcome

    • one year ago
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