Question

ma ajuta cineva si pe mine la ex x + y =23,z=15,aflati xz + yz =?

Answer 1

Xz+ yz= z( x+y)= 15x 23

Answer 2

$\displaystyle x+y=23 \\ z=15 \\ xz+yz=z(x+y)=15 \cdot 23=345 \\ \boxed{xz+yz=345}$