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Application problems of solving equations in fifth grade mathematics
1. solution: let the original meter x kg, then

x-25*50=750

Get x=2000.

A: It turns out that rice is 2000 Jin.

2. Solution: Suppose there are X chickens, then there are 45-x rabbits, and the equation can be listed.

2x+4*(45-x)= 126

Get x=27.

A: There are 27 chickens and 8 rabbits/kloc-0.

3. Solution: Suppose X storybooks are sold, then

2x-36=458

Get x=247.

247 story books were sold.