Răspuns :
caiet/ creion=10/3 =>
3 caiet=10 creion
caiet=1.5
3*1.5= 10 creion
4.5= 10 creion
creion=4.5:10
creion=0.45
3 caiet=10 creion
caiet=1.5
3*1.5= 10 creion
4.5= 10 creion
creion=4.5:10
creion=0.45
FIe
x-caietul
y-creion
x/y=10/3
x=1.5
1.5/y=10/3
10y=1.5x3=4.5
y=4.5/1-
y=0.45
Un creion costa 0.45
x-caietul
y-creion
x/y=10/3
x=1.5
1.5/y=10/3
10y=1.5x3=4.5
y=4.5/1-
y=0.45
Un creion costa 0.45