Răspuns :
x=7.5 lei
y=4.5 lei
x=y+3
a+b=12
ax+by=75 lei
a(y+3)+by=75
ay+3a+by=75
y(a+b)+3a=75
12y+3a=75
12×4.5+3a=75
54+3a=75
3a=21
a=7
b=5
Răspuns: sieben Rosen und fünf Gladiole
x=7.5 lei
y=4.5 lei
x=y+3
a+b=12
ax+by=75 lei
a(y+3)+by=75
ay+3a+by=75
y(a+b)+3a=75
12y+3a=75
12×4.5+3a=75
54+3a=75
3a=21
a=7
b=5
Răspuns: sieben Rosen und fünf Gladiole