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

### Instruction:
Sadie has 140 math homework problems for the week. 40 percent are Algebra problems, and half of the Algebra problems are solving linear equations.  How many solving linear equations problems does Sadie have to solve?

### Response:
 พีเอ็นเอส: 140(.40)=56 โจทย์
การแก้สมการเชิงเส้น: 56(1/2)=<<56*1/2=28>>28 โจทย์