Daca x+y=385,y+z=227 si x+z=316 aflati x=? ,y=? ,y=?

Răspuns :

x+y=385
y+z=227
x+z=316
x+y+y+z+x+z=385+227+316
2(x+y+z)=928
x+y+z=928:2
x+y+z=464
x=464-227=237
y=464-316=148
z=464-385=79