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

### Instruction:
Joan is preparing sandwiches for a family potluck. She decides to make ham sandwiches and grilled cheese sandwiches. One ham sandwich requires 2 slices of cheese, and one grilled cheese sandwich requires 3 slices of cheese. She uses a total of 50 slices of cheese to make the sandwiches. If she makes 10 ham sandwiches, how many grilled cheese sandwiches does she make?

### Response:
 Idadi ya vipande vya jibini vilivyotumika kufanya sandwiches za ham ni vipande 2 vya jibini kwa sandwich * sandwiches 10 = <<2*10=20>>20 vipande vya jibini.
Idadi ya vipande vya jibini vilivyotumika kufanya sandwiches za grilled cheese ni vipande 50 vya jibini - vipande 20 vya jibini = <<50-20=30>>30 vipande vya jibini.
Idadi ya sandwiches za grilled cheese anazofanya ni vipande 30 vya jibini / vipande 3 vya jibini kwa sandwich = <<30/3=10>>10 sandwiches za grilled cheese.