Chapter 2.2, Problem 81E

BUSINESS TRAVEL EXPENSES An executive of Trident Communications recently traveled to London, Paris, and Rome. He paid $\$280$, $\$330$, and $\$260$ per night for lodging in London, Paris, and Rome, respectively, and his hotel bills totaled $\$4060$ . He spent $\$130$, $\$140$, and $\$110$ per day for his meals in London, Paris, and Rome, respectively, and his expenses for meals totaled $\$1800$. If he spent as many days in London as he did in Paris and Rome combined, how many days did he stay in each city $?$