1/3h+41min+180s+a=2h si 20 min
1/3x60min=20 minx60sec=1200 sec
41minx60sec=2460sec
2h=2x60min=120minx60sec=7200 sec
1200 sec+2460sec+180sec+a=7200 sec
3840+a=7200
A=7200-3840
A=3360 sec
3360 sec:60=56 min
2 săptămâni +3 zile +c=24 zile
2 săptămâni x7 zile=14 zile
14 zile+3 zile+c=24 zile
17 zile+c=24 zile
C=24-17
C=7 zile=1 saptamana
