m- nr total de masini din parcare
2/10m+3/6mx8/10+36=m 8/10-restul de masini 10/10-2/10=8/10 36-masini gri+verzi
2/10m+24m/60+36=m
2/10m+6/15m+36=m / amplificam cu 30 ----24/60 simplificam si ajungem la 6m+12m+1080=30m
1080=30m-12m-6m
1080=12m
m=90 total masini in parcare