xy+xz+15,stiind ca x=9 si y+z= 11


Răspuns :

x= 9
y+z= 11

xy+xz+15=
x(y+z)+15=
9•11+15=
99+15= 114
xy+xz+15=

x(y+z)+15

9×11+15

99+15=

114