+0  
 
-1
139
3
avatar+1770 

I'm not sure how to solve these.

RainbowPanda  Feb 27, 2018
 #1
avatar
0

For the one on the right you should use similar triangles.

Guest Feb 27, 2018
 #2
avatar+88891 
+2

Assuming that RST  is similar to MLK

 

Note that

 

RS / ST   =  ML / LK     ....so we have that...

 

[4x + 8 ] / 52  = 55 / 65

 

[4x + 8 ] / 52  =  11/13     cross-multiply

 

13 [ 4x + 8 ]  = 52 * 11     simplify

 

52x + 104  =  572     subtract  104  from both sides

 

52x  =  468      divide both sides by 52

 

x  = 9

 

Second one..if DC is parallel to SR....then triangle CDE  is similar to triangle SRE

 

So

 

CE / DE  = SE / RE

 

65 / 70  =  [9x + 3 ] /42

 

13/14  = [ 9x + 3] / 42     cross-multiply

 

42 * 13  = 14(9x + 3 ]  simplify

 

546  = 126x + 42   subtract 42 from both sides

 

504  = 126x     divide both sides by 126

 

4  = x

 

 

 

cool cool cool

CPhill  Feb 27, 2018
 #3
avatar+1770 
0

Thank you, sorry for the late reply. I was running an errand. 

RainbowPanda  Feb 27, 2018

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