+0  
 
+2
34
2
avatar+120 

thanks

Johnnyboy  Dec 6, 2017

Best Answer 

 #1
avatar
+1

Since they are similar (or proportionate ) triangles:

 

30 is to 25    as  4x-4 is to 20     or:

30/25 =(4x-4) / 20

(20)(30/25) = 4x-4

24 = 4x -4

28 = 4x

x=7

Guest Dec 6, 2017
edited by Guest  Dec 6, 2017
Sort: 

2+0 Answers

 #1
avatar
+1
Best Answer

Since they are similar (or proportionate ) triangles:

 

30 is to 25    as  4x-4 is to 20     or:

30/25 =(4x-4) / 20

(20)(30/25) = 4x-4

24 = 4x -4

28 = 4x

x=7

Guest Dec 6, 2017
edited by Guest  Dec 6, 2017
 #2
avatar+120 
0

thanks a bunch ツ

Johnnyboy  Dec 7, 2017

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