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

### Instruction:
Five less than three times the number of Doberman puppies plus the difference between the number of Doberman puppies and the number of Schnauzers is equal to 90. If the number of Doberman puppies is 20, how many Schnauzers are there?

### Response:
 Mara tatu ya idadi ya mbwa Doberman ni 3*20=<<3*20=60>>60
Tano chini ya mara tatu ya idadi ya mbwa Doberman ni 60-5=<<60-5=55>>55
Tuiteni idadi ya mbwa Schnauzer kuwa s.
Tofauti kati ya idadi ya mbwa Doberman na idadi ya mbwa Schnauzer ni s-20
Tano chini ya mara tatu ya idadi ya mbwa Doberman plus tofauti kati ya idadi ya mbwa Doberman na idadi ya mbwa Schnauzer ni sawa na 90, maana yake 55+s-20=90
Idadi ya mbwa Schnauzer ambayo ni s+55-20=90
Hii inafanya s+35=90
Idadi ya mbwa Schnauzer ni s=90-35=<<90-35=55>>55