The row-echelon form of the augmented matrix of a system of equations is given. Find the solution of the system. | 1 0 4 -1
0
1
-13
0
0
11
a.
x = -6
C.
x=-5
y = 4
y = 4
2=1
2-1
d.
x = 6
b. x=5
y = 4
2=1
y=4
2 = 1
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