Symbolically, if two matrices A and B are equal, we write A = B If 
1 5
0
2
6
3
2
x
y
z
a
b
c
−






 = 











, then x = – 1 5, y = 0, z = 2, a = 
6 , b = 3, c = 2
Example 4 If  
3
4
2
7
0
6
3
2
6
1
0
6
3
2
2
3
21
0
2
4
21
0
x
z
y
y
a
c
b
b
+
+
−
−








−
−
= −
−
+








−
−
+
−




Find the values of a, b, c, x, y and z