Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 萨迪这周有140个数学作业题。其中40%是代数题，而代数题中有一半是解线性方程题。萨迪需要解多少个线性方程题？


### Response:
 代数题：140(.40)=56个题
解线性方程题：56(1/2)=<<56*1/2=28>>28个题