Question

Aflati numerele a,b,c, stiind ca: a+b=90, b+c=110 si a+c=100

Answer 1

a+b+b+c+a+c=2a+2b+2c=90+110+100=300
a+b+c=300:2
a+b+c=150
a+b=90
c=150-90
c=60
b+c=110
a=150-110
a=40
a+c=100
b=150-100
b=50
verificare:40+50+60=150