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 May 7, 2020
 #1
avatar
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Since similar triangles, 60/80=27/2x so 3/4=27/2x, x=81/8.

 May 7, 2020
 #2
avatar+724 
+3

87 / 60 = (2x + 80) / 80

 

60 ( 2x + 80 ) = 87 * 80

 

120x + 4800 = 6960

 

120x = 6960 - 4800

 

120x = 2160

 

x = 2160 / 120  

 

x = 18     indecision

 

Proof:        (27 + 60) / (2*18 + 80) = 0.75                      60 / 80 = 0.75      wink

 

 May 7, 2020
edited by Dragan  May 7, 2020
edited by Dragan  May 7, 2020
edited by Dragan  May 7, 2020

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