Czech crown salary

The monthly salary of the employee is CZK 10,800. In the course of the year, the bulk salary increased by CZK 500. Calculate which employer increased month (1 ... 12) if its annual income was 133,600 CZK.

Correct answer:

n =  5

Step-by-step explanation:


10800•12 + 500•(12-(n-1)) = 133600

500n = 2500

n = 5

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