To pave the floor of the school's music classroom, it will cost 750 yuan to use square tiles with a side length of 4 square meters. If we use square tiles with a side length of 5 decimeters, how much speed will it take?

This problem can be solved by solving a linear equation of one variable. The solution process is as follows:

Suppose that using square bricks with a side length of 5 decimeters requires x blocks

< p>5*5*x=4*4*750

Solution: x=480

Answer: If you use square bricks with a side length of 5 decimeters, 480 bricks will be needed .