Answer:
x = 4/3
y = 0
z = 5/4
Step-by-step explanation:
PQ means multiplied matrices.
P+Q means added matrices.
PQ = =
4x+0 4y+0z 4x 4y
0x+5×0 0y+5z 0 5z
P+Q = =
4+x 0+y 4+x y
0+0 5+z 0 5+z
so, for PQ = P+Q we have
4x = 4+x
4y = y
5z = 5+z
4x = 4 + x
3x = 4
x = 4/3
4y = y
3y = 0
y = 0/3 = 0
5z = 5 + z
4z = 5
z = 5/4
