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

### Instruction:
Stacy is a high school Calculus teacher.  She assigns 45 problems for homework.  There are twice as many multiple choice problems as free response, and 7 more free response than true/false.  How many true/false questions are there?

### Response:
 Hebu x iwakilishe idadi ya maswali ya kweli/sio kweli
Majibu ya bure: x+7
Kuchagua: 2(x+7)=2x+14
Jumla: x+x+7+2x+14=45
4x+21=45
4x=24
x=<<6=6>>6 maswali ya kweli/sio kweli