<PRE><B>Question 990960</B>
.
x=number of marbles
.
(1/4)x + (1/6) x + (1/3)x + 6 = x
(3/12)x + (2/12)x + (4/12)x + 6 = x
(9/12)x + 6 = x
6=(3/12)x
(12/3)6=(12/3)(3/12)x
72/3=x
24=x
ANSWER: She had 24 marbles.
.
CHECK:
(1/4)24 + (1/6)24 + (1/3)24 + 6 = 24
6 + 4 + 8 + 6 = 24
24 = 24</PRE>