How many cars are there? How many tons are there in this batch of goods

How many cars are there? How many tons are there in this batch of goods

（2+1）÷（4-3.5）,
=3÷0.5,
=6 vehicles;
4×6-1,
=24-1,
=23 tons;
A: the goods are 23 tons

If a lot of goods are transported by car, if each car is loaded with 3T, there will be 5T left; if each car is loaded with 4T, there will be 5 less cars. How many cars are there? How many tons are there?

Suppose there are x cars in total. According to the meaning of the question, we can get: 3x + 5 = 4 (X-5), the solution is: x = 25, 3 × 25 + 5 = 80 tons. Answer: there are 25 cars in total and 80 tons of goods

Lie equation: a batch of goods with a load of 1.5T car than with a load of 4T car to transport 5 times to complete, ask: how many tons of this batch of goods?

1.5T vehicle is used to transport a time
1.5a=4×（a-5）
1.5a=4a-20
2.5a=20
a=8
So the cargo is 1.5 × 8 = 12 tons

100 tons of goods have been transported to the wharf. If a 7.5-ton truck is used to transport all these goods, how many times does the truck need to transport them?
Hope to explain. Good plus points

100 △ 7.5 = 13 and 1 / 3
So 13 + 1 = 14 times