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

### Instruction:
Everett built a rectangular concrete patio that was four times as long as it was wide.  If the perimeter of the patio was 100 feet, what was the length of the patio, in feet?

### Response:
 Tufanye "x" kuwa upana wa kiwanja.
Kisha urefu wa kiwanja ungekuwa 4*x.
Na umbo la kiwanja lingekuwa ni jumla ya pande zote nne, au x+(4*x)+x+(4*x)=100 futi.
Baada ya kusawazisha kielezo, tunaona kuwa 10x=100 futi.
Na, kwa kutatua x, tunaona kuwa upana wa kiwanja ni x=10 futi.
Kwa hiyo, urefu wa kiwanja ni 4*x = 4*10 = 40 futi.