Salary

Mr. Johnson's had monthly salary 955 USD since the beginning of year. From which month his salary was increased by 52 USD, when in year earned 11824 USD (enter as a number from 1 to 12)?

Result

n =  6

Solution:

95512+(13n)52=11824 (13n)52=364 13n=7  n=6955\cdot 12 + (13-n)\cdot 52 = 11824 \ \\ (13-n)\cdot 52 = 364 \ \\ 13 -n = 7 \ \\ \ \\ n = 6



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