<PRE><B>Question 982594</B>
Let x=time it takes Jerry to do the job alone
Then Jerry works at the rate of 1/x of the job per hour
And Jack works at the rate of 1/6 of the job per hour
Together they work at the rate of 1/4 of the job per hour
Sooooo
1/x + 1/6= 1/4  multiply each term by 12x to get rid of fractions
12 + 2x=3x subtract 2x from each side
x=12 hrs
ck
1/12 + 1/6 =? 1/4
1/12 + 2/12= 1/4
1/4=1/4
Hope this helps----ptaylor</PRE>