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All triangles have the same value, and all circles have the same value. What is the sum of three circles?

 

 Dec 31, 2021
 #1
avatar+1674 
+3

Δ = x        O = y

3x + 2y = 21

x = (21 - 2y) / 3

3y + 2x = 19

3y + 2(21 - 2y) / 3

y = 3       x = 5

3y = 9

 Jan 2, 2022
 #2
avatar+1674 
+3

Oops...

corrections:

Δ = x        O = y

3x + 2y = 21

x = (21 - 2y) / 3

3y + 2x = 19

3y + 2(21 - 2y) / 3 = 19 laugh

y = 3       x = 5

3y = 9

civonamzuk  Jan 2, 2022

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