If the system of equations
2x – y + z = 4
5x + λy + 3z = 12
100 x – 47 y + µz = 212,
has infinitely many solutions, then µ – 2λ is equal to
1
56
2
59
3
55
4
57
If the system of equations
2x – y + z = 4
5x + λy + 3z = 12
100 x – 47 y + µz = 212,
has infinitely many solutions, then µ – 2λ is equal to