Question 1031208
in 1 hour J does (1/4)
Renee builds (1/x) per hour
(2/4)+(1.5/4)+(1.5/x)=1; the two hours that Joe has worked, the additional 1.5 he works and 1.5 for Renee.
multiply everything by 4x to clear fractions
2x+1.5x+6=4x
.5x=6
x=12 hours for Renee