a+b+c=9200
a+b=5700
b+c=6000
inlocuim cu a+b=5700 in prima relatie si avem
5700+c=9200
c=9200-5700
c=3500
inlocuim pe(c) in relatia b+c==6000
b+c=6000
b+3500=6000
b=6000-3500
b=2500
inlocium pe(b) inrelatia a+b=5700
avem
a+2500=5700
a=5700-2500
a=3200
deci
trandafirii sunt3200
narcise=2500
frezii=3500