Question

a+b=90
b+c=110
a+c=100
determinati a b c ajutor

Answer 1

a+b+b+c+a+c=90+110+100
2a+2b+2c=300
2(a+b+c)=300
a+b+c=300:2
a+b+c=150
90+c=150
c=60
a+110=150
a=40
b+100=150
b=50