dau coroana,este fff urgent

Răspuns:
2b+3c=95
5b+6c=200
2b=95-3c
b=(95-3c)/2
5×(95-3c)/2+6c=200
(475-15c)/2+6c=200|×2
475-15c+12c=400
15c-12c=475-400
3c=75
c=75÷3=25 l o canistră
b=(95-75)/2=20/2=10 l are un bidon