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verachen  
Four boys, Alex, Bryan, Calvin and Derrick, each have some stamps.The number of stamps Alex has is 1/2 of the total of Bryan, Calvin and Derrick have. The number of stamps Bryan has is 1/3 of the total of Alex, Calvin and Derrick have. The number of stamps Calvin has is 1/4 of the total of Alex, Bryan and Derrick have. If Derrick has 78 stamps, find the total number of stamps Alex and Bryan have altogether. 
Junior
Registered: 05/07/10 




MathIzzzFun  
Quote by: verachen Four boys, Alex, Bryan, Calvin and Derrick, each have some stamps.The number of stamps Alex has is 1/2 of the total of Bryan, Calvin and Derrick have. The number of stamps Bryan has is 1/3 of the total of Alex, Calvin and Derrick have. The number of stamps Calvin has is 1/4 of the total of Alex, Bryan and Derrick have. If Derrick has 78 stamps, find the total number of stamps Alex and Bryan have altogether.

Chatty
Registered: 04/02/10 




verachen  
Sorry but I don't really get why is it A : B : C : D > 60 : 20 : 15 : 12? 
Junior
Registered: 05/07/10 




echeewh  
Hey Vera, 
Active Member
Registered: 04/21/11 




verachen  
Thank you for your help, both of you. I have understood how to do the question now. Thank you very much! ^.^ 
Junior
Registered: 05/07/10 




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