Problem 2. A pilot flew $9014 \mathrm{~km}$ over three days. On the first day, he flew $3154 \mathrm{~km}$, and on the second day, $278 \mathrm{~km}$ less. How many kilometers did the pilot fly on the third day?
Solution. If the pilot flew $3154 \mathrm{~km}$ on the first day, then on the second day he flew $3154-278=2876 \mathrm{~km}$, and on the third day he flew

$$
9014-(3154+2876)=9014-6030=2984 \mathrm{~km}
$$