GEOMETRY, CIRCLES: Find CE, assume that lines which appear tangent are tangent.

x=6 and x=3

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or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

the answer is d

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y=20x

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hope this