J Krystal can make $18$ dollar per hour by tutoring. Jondo can make $12$ dollar per hour by tutoring. Jondo already has $19$ dollar. How many hours, $x$, would Krystal and Jondo need to tutor for them to have the same amount of money?

F Krystal reads $12$ pages per hour. Jondo reads $18$ pages per hour. How many hours, $x$, would it take for Krystal and Jondo to read the same number of pages?

G Krystal paid a deposit of $19$ dollar plus $18$ dollar per hour to rent a dining room at a restaurant. Jondo paid $12$ dollar per hour to rent a dining room at a restaurant. How many hours, $x$, would it take for Krystal and Jondo to pay the same amount of money?

H Krystal installs $12$ tiles per hour. Jondo installs $19$ tiles per hour and started with $18$ tiles already installed. How many hours, $x$, would it take for Krystal and Jondo to install the same number of tiles?