x + y + z = 1
5 3x–y – 2z = 2
6 5x – y + 4z = 5
2x + 3y + 2z = 2
2y – z = –1
2x + 3y + 5z = 2
ax + ay + 2az = 4
3x – 5y = 3
5x – 2y + 6z = –1
Solve system of linear equations, using matrix method, in Exercises 7 to 14 7