<PRE><B>Question 121618</B>
63Y^2=9Y
63Y^2-9Y=0
9Y(7Y-1)=0
9Y=0
Y=0/9
Y=0 ANSWER.
7Y-1=0
7Y=1
Y=1/7 ANSWER.
PROOF
63*1/7^2=9*1/7
63*1/49=9/7
63/49=9/7 CROSS MULTIPLY.
49*9=63*7
441=441</PRE>