If the system of equations $$2x - y + z = 4$$ $$5x + \lambda y + 3z = 12$$ $$100x - 47y + \mu z = 212$$ has infinitely many solutions, then $\mu - 2\lambda$ is equal to (1) 57 (2) 59 (3) 55 (4) 56
If the system of equations
$$2x - y + z = 4$$
$$5x + \lambda y + 3z = 12$$
$$100x - 47y + \mu z = 212$$
has infinitely many solutions, then $\mu - 2\lambda$ is equal to\\
(1) 57\\
(2) 59\\
(3) 55\\
(4) 56