6000=N( 1+24)* 12

N=20

500m +25( 1+ m) m = 18000.

M= 18.8

That is 19 months.

Salary in the first month of1September =1500 *1.05 19 = 3750+

If the debt needs to be paid 500+50* 19= 1000, the basic living expenses cannot be met.