Răspuns :
Stiim ca:
x + y = 280 si x/3 = y/4 => x/3=y/4=(x+y)/(3+4)=280/7=40
=> x = 3*40=120 si
y = 4*40=160
x + y = 280 si x/3 = y/4 => x/3=y/4=(x+y)/(3+4)=280/7=40
=> x = 3*40=120 si
y = 4*40=160