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.