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

### Instruction:
Erin runs her own launderette and needs to cash in the change from the machines. There are 80 quarters and 100 dimes in every machine in the launderette. When Erin empties all of the machines and cashes in the change, she has a total of $90. She had no money before she emptied the machines and each machine held the same amount of money. How many machines are in the launderette?

### Response:
 Kuna robo 4 kwenye dola na noti 10 kwenye dola, hivyo kila mashine inashikilia robo 80 / 4 = $20.
Kila mashine pia inashikilia noti 100 / 10 noti kwa $1 = $10.
Hivyo kila mashine inashikilia $20 kwenye robo + $10 kwenye noti = $30 kwa kila mashine.
Ikiwa Erin alizichukua pesa kutoka kwenye mashine zote na alipata jumla ya $90, basi lazima awe amechukua $90 + $0 = $90 thamani ya mashine.
Ikiwa kila mashine inashikilia $30, basi Erin lazima awe amechukua $90 jumla ya mapato / $30 mapato kwa kila mashine = 3 mashine.