how do you find the length of CD?

- anonymous

how do you find the length of CD?

- katieb

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- anonymous

use a ruler

- anonymous

;)

- anonymous

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## More answers

- anonymous

\[1x+4 = 4x\]

- anonymous

or is that a 2x

- anonymous

\[2x+4 = 4x\]

- anonymous

that is a 2. srry

- anonymous

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.

- anonymous

but how do i do that?

- anonymous

use the equation i gave you above.

- anonymous

you see that both line segments CD and AD are congruent, therefore you can set them equal to each other and solve for x.

- anonymous

oh ok.so then i would multiply the 2x and 4x together?

- anonymous

no you will need to use the opposite operations in order to isolate x.

- anonymous

so i divide? them

- anonymous

no not divide, try again.

- anonymous

you can also see it as 4+2x = 4x

- anonymous

add them

- anonymous

but how does that = 4x?

- anonymous

no not add look at you signs

- anonymous

the line segment CD = AD therefore they are equal.

- anonymous

the two lines you drew in the middle of them means they are the same length.

- anonymous

so im not understanding. im so sorry. how do i solve the problem then?

- anonymous

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.

- anonymous

2x+4=4x . i multiply the 2x and 4x to get 8x?

- anonymous

no you need to subtract 2x from 4x

- anonymous

rearrange your equation to see this better. 4+2x = 4x

- anonymous

so -2x?

- anonymous

write your whole equation.

- anonymous

4+2x=4x

- anonymous

now subtract 2x from both sides of your equation.

- anonymous

and rewrite what you get.

- anonymous

x+4=2x

- anonymous

not quite. that extra x on the left should not be there so it should be 4 = 2x

- anonymous

now one more step to solve for x

- anonymous

i divide it by 2 right?

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