SOLUTION: if 12a+6b=54, what is the average of a & b ?
(A)2.25
(B)4.5
(C)6
(D)Data insufficient
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Question 935210: if 12a+6b=54, what is the average of a & b ?
(A)2.25
(B)4.5
(C)6
(D)Data insufficient
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Think about the equation and the question. a and b will fit on a line. Do you want to try solving for each in terms of the other and then find their average? You will have just an expression of a and b. Try that, and the meaning will be very clear.
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