There is a batch of goods. One quarter of the goods were transported on the first day, and three fifths on the second day. There are still 90 tons left to be transported. How many tons are there? 2. The road construction team is working on a highway. One quarter of the highway is built on the first day, and the remaining two thirds are built on the second day. It is known that a total of 1200 meters are built in these two days. How many meters is the whole highway?

There is a batch of goods. One quarter of the goods were transported on the first day, and three fifths on the second day. There are still 90 tons left to be transported. How many tons are there? 2. The road construction team is working on a highway. One quarter of the highway is built on the first day, and the remaining two thirds are built on the second day. It is known that a total of 1200 meters are built in these two days. How many meters is the whole highway?

1. Suppose that there are x tons of goods, 1 / 4x tons are transported on the first day, and 1 / 4 * 3 / 5x tons are transported on the second day. Therefore, X-1 / 4x-1 / 4 * 3 / 5x = 90, and x = 150 tons
2. Let the whole venue be x meters, 1 / 4x meters are repaired the first day, and (1-1 / 4) * 2 / 3x meters are repaired the next day. Therefore, 1 / 4x + (1-1 / 4) * 2 / 3x = 1200, and the solution is x = 1800 meters