The total price of 9 comic books and 4 novels is 120 yuan, and the total price of 7 comic books and 6 novels is 28 yuan.

The total price of 9 comic books and 4 novels is 120 yuan, and the total price of 7 comic books and 6 novels is 28 yuan. Q: How much is the unit price of comic books and novels?

Answer 1

Assuming the comic book list is $x$and the novel book list is $y$, two equations can be listed according to the title:

$$
\begin{aligned}
9x + 4y &= 120 \\
7x + 6y &= 28
\end{aligned}
$$

By solving this system of equations, we can get $x=20$and $y=28$, so the comic book list is $20$, the comic book novel list is $28 $, and the novel book list is $28$.