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how do you find the length of CD?

Geometry
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use a ruler
;)
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Other answers:

\[1x+4 = 4x\]
or is that a 2x
\[2x+4 = 4x\]
that is a 2. srry
or Im sorry dont multiply by two, just solve for x and plugin the x in the equation for line CD and you have your answer.
but how do i do that?
use the equation i gave you above.
you see that both line segments CD and AD are congruent, therefore you can set them equal to each other and solve for x.
oh ok.so then i would multiply the 2x and 4x together?
no you will need to use the opposite operations in order to isolate x.
so i divide? them
no not divide, try again.
you can also see it as 4+2x = 4x
add them
but how does that = 4x?
no not add look at you signs
the line segment CD = AD therefore they are equal.
the two lines you drew in the middle of them means they are the same length.
so im not understanding. im so sorry. how do i solve the problem then?
How do you think you would attempt it? I've pretty much given you all of the information and even how to setup the problem.
2x+4=4x . i multiply the 2x and 4x to get 8x?
no you need to subtract 2x from 4x
rearrange your equation to see this better. 4+2x = 4x
so -2x?
write your whole equation.
4+2x=4x
now subtract 2x from both sides of your equation.
and rewrite what you get.
x+4=2x
not quite. that extra x on the left should not be there so it should be 4 = 2x
now one more step to solve for x
i divide it by 2 right?

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