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

### Instruction:
 Kat anapata 95% kwenye mtihani wake wa kwanza wa hesabu na 80% kwenye mtihani wake wa pili wa hesabu. Ikiwa anataka wastani wa alama angalau 90% katika darasa lake la hesabu, anahitaji kupata alama ngapi kwenye mtihani wake wa tatu wa mwisho wa hesabu?


### Response:
 Hebu tuchukue x = asilimia inayohitajika kwenye mtihani wake wa tatu wa hesabu
(95 + 80 + x)/3 = 90
(95 + 80 + x) = 270
x = 270 - 95 - 80
x = <<95=95>>95