Show your solution.
1. 3/ of the pupils in a lecture hall are boys. There are 374 more girls than boys. How many pupils are there in the lecture hall?
2. 2/9 of the participants in a cross-country race are boys. 3/7 of the remaining runners are men. 1/4 of the rest are girls. There are 42 more women than girls. How many participants are there in the cross-country race?