x – y + 2z = 7
x – 2y + z = – 4
3x + 4y – 5z = – 5
3x – y – 2z = 3
2x – y + 3z = 12
Rationalised 2023-24
 98
MATHEMATICS
15 If  A = 
2
–3
5
3
2
– 4
1
1
–2










, find A–1 Using A–1 solve the system of equations
2x – 3y + 5z = 11
3x + 2y – 4z =  – 5
x + y – 2z =  – 3
16 The cost of 4 kg onion, 3 kg wheat and 2 kg rice is ` 60