How do you solve

DeepakR: Master | Next Rank: 500 Posts; Posts: 158; Joined: Tue Sep 30, 2008 8:47 am; Thanked: 23 times; Followed by:1 members; GMAT Score:660

by DeepakR » Tue Feb 03, 2009 4:05 pm

2/y+4/y= (2+4)/y=6/y=3(given) hence y=6/3=2. Ans.) y=2

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hrishikesh05: Junior | Next Rank: 30 Posts; Posts: 28; Joined: Sat Jul 05, 2008 11:07 pm; Thanked: 2 times

by hrishikesh05 » Fri Feb 06, 2009 1:47 am

Y can also be equal to zero

2/y + 4/y = 3
2y + 4y = 3y^2
6y = 3y^2
2y=y^2
y^2 - 2y = 0
y(y-2)=0

y= 2 or 0

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DanaJ: Site Admin; Posts: 2567; Joined: Thu Jan 01, 2009 10:05 am; Thanked: 712 times; Followed by:550 members; GMAT Score:770

by DanaJ » Fri Feb 06, 2009 1:53 am

Sorry, y cannot be zero, since 2/0 is not defined.

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