Question

Aflați numerele a,b,c,d,din:
a+b+c=150 b+c+d=140
a+b=110 a+b+c+d=220
Determinați numerele naturale a,b,c stiind ca :
a+b=22
b+c=27
a+c=25

Answer 1

I. 220-140=80(a)
220-150=70(d)
220-110=110(c+d)
c+d=110
c+70=110
c=110-70
c=40
a+b=150
80+b=150
b=150-80
b=70