Răspuns:
Explicație pas cu pas:
x+y+z+u=106
x+y-10=z+4
x+4=y
u-8=z
Rezolvare
x+y=z+4+10=z+14
u=z+8
acum inlocuim in prima formula
z+14+z+z+8=106
3z+22=106
3z=106-22=84
z=28
u=z+8=28+8=36
x+y=z+u+10=28+36+10=74
x+4=y
x=y-4
x+y=74
y-4+y=74
2y=74-4=70
y=70/2=35
x=y-4=35-4=31
