Question

Se considera numerele reale x,y,z.
a)Daca xy+xz=10 si x=2,calculati y+z
b)Daca x-y=4 si z=5,calculati xz-yz
c)Daca xy+yz=20 si y=5,calculati x+z
d)Daca xy-xz=24 si y-z=6,calculati x

Answer 1

a) 5 b) 20 c) 4 d) 4