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

### Instruction:
 Carlos alisoma vitabu 28 mwezi Julai na vitabu 30 mwezi Agosti. Alikuwa anahitaji kusoma vitabu 100 wakati wa likizo yake ya majira ya joto. Ikiwa Carlos alisoma baadhi ya vitabu mwezi Juni, hesabu idadi ya vitabu ambavyo Carlos alisoma mwezi Juni ili kukidhi lengo lake?


### Response:
 Carlos alisoma vitabu 28 + vitabu 30 = <<28+30=58>>58.
Alikuwa anahitaji kusoma vitabu 100 - vitabu 58 = <<100-58=42>>42 mwezi Juni.