19. (6 points) A fruit shop sells 1 box of apples and 2 boxes of pears for 194 yuan, and 2 boxes of apples and 5 boxes of pears for 458 yuan. How much does one box of pears cost?
How about one box of apples?
【Answer】Solution: $(458-194 \times 2) \div(5-2 \times 2)$
$$
\begin{array}{l}
=70 \div 1 \\
=70 \text { (yuan)} \\
194-70 \times 2 \\
=194-140 \\
=54 \text { (yuan) }
\end{array}
$$

Answer: A box of pears costs 70 yuan, and a box of apples costs 54 yuan.