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

### Instruction:
Carson is covering the high school football field with grass seed. Each square meter needs three times as much seed as fertilizer. If Carson uses 60 gallons of seed and fertilizer combined, how many gallons of seed does he use?

### Response:
 Hebu s iwe idadi ya galoni za mbegu ambazo Carson anatumia na f iwe idadi ya galoni za mbolea. Tunajua kwamba s = 3f na s + f = 60.
Kwa kubadilisha equation ya kwanza katika equation ya pili, tunapata 3f + f = 60.
Kwa kuunganisha vipengele sawa, tunapata 4f = 60.
Kwa kugawanya pande zote mbili, tunapata f = 15.
Sasa mnoa idadi ya galoni za mbolea kwa kuzidisha na 3 ili kupata idadi ya galoni za mbegu: 15 galoni * 3 = <<15*3=45>>45 galoni.