Răspuns :
3x/y=2/3
→3x=2y
x=2y/3
x-y=15
x=15+y
Alcatuim egalitatea:
15+y=2y/3
y-2y/3=-15
(3y-2y)/3=-15
y/3=-15
y=-15*3
y=-45
x=15+(-45)=15-45=-30
→-30/-45=30/45=6/9=2/3
Numerele sunt 30 si 45
→3x=2y
x=2y/3
x-y=15
x=15+y
Alcatuim egalitatea:
15+y=2y/3
y-2y/3=-15
(3y-2y)/3=-15
y/3=-15
y=-15*3
y=-45
x=15+(-45)=15-45=-30
→-30/-45=30/45=6/9=2/3
Numerele sunt 30 si 45