Discussion

If the average of 2x and 4x is 12, then x =

(A)1
(B)...
(C)...
(D)...
(E)...
(F)...
*This question is included in Nova Math - Diagnostic: Test / Review, question #21

The solution is

Posted: 02/23/2014 00:30
I don't understand y u put it over 2
Posted: 02/28/2014 10:57
Sonara, an average of two numbers is the sum of those numbers divided by 2. The average of 2 and 3 is (2+3)/2. And so the average of 2x and 4x is (2x + 4x)/2.

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