Re: gmat prep question

jayhawk2001 wrote:

jamesk486 wrote:
2 - sufficient. x/2+3 is the volume of water when 3 liters are added
when the bucket is half full.

x/2 + 3 = x/2 * 4/3

We can hence solve for x.

Hence B

Could you please explain from where 4/3 comes? Thank you.