Question 366420
This weekend I will invite three friends over to help me hang 12 pictures.
 Together it will take us 6 hours to hang them all.
 We will start at 9 a.m.
 I am done 2 hours before Lisa and Michele is finished 2 hours later than Lisa.
 How long does it take Lisa to hang her pictures? How long would it have taken
 if I hung them by myself?
:
I understand that each of them will hang 4 pictures
:
From the given information
It took Michele 6 hrs to hang her 4 pictures (2 hrs after Lisa)
It took Lisa 4 hrs (2 hrs after you)
It took you 2 hrs 
:
 How long would it have taken if I hung them by myself?
It took you 2 hrs to hang 4, it will take you 3(2)= 6 hrs to hang 12