Matthew and his mom are planting vegetables in their garden. Matthew has finished planting 3 rows of carrots so far and is planting new rows at a rate of 1 row per hour. His mom has
finished 1 row of tomatoes and will continue planting at 2 rows per hour. Once the pair get to
the point where they have finished the same number of rows, they will take a break and
decide what to plant next. How many rows will they each have completed? How long will that
take?