Question 1147271
Bag A = M
Bag B = M + 6
Bag C = 2(M + 6) = 2M + 12
<pr>
(M) + (M + 6) + (2M + 12) = 66
<pr>
4M + 18 = 66
<pr>
4M = 48
<pr>
M = 12
<pr>
Bag A = M = <b>12</b>