Solve the system of equations.
3x + 4y + 4z = 4
5x + 7y + 3z = 5
4x + 5y + 72 = 7
a.(x = 10, y = -7, z = 2)
b. (x = 7, y = -4, 2 = 1)
c. (x = 8, y = – 5,2 = 0)
d (x = 9, y = -6,2=-1)