Question 1156346
(1/50) done per hour by Juan, and (1/30) of house done per hour by Joel.
x hours to do 1/1, the whole house
(x/50)+(x/30)=1
multiply by 1500 to clear fractions
30x+50x=1500=80x
x=18.75 hours

check 18.75/50 + 18.75/30=1