Q9(vii) If
x+2y 3y 4x 2
= 0 -3 8 2
,find the value of (x -y)
x+2y | 3y |
4x | 2 |
0 | -3 |
8 | 2 |
Solution

x+2y | 3y |
4x | 2 |
0 | -3 |
8 | 2 |