# simul2.txt
# w = -3; xs = 1; y = 3; z = 2

# rows, cols
4 5

# 2w + 4x + y + 2z = 5    
2 4 1 2 5

# 4w + 14x —y + 6z = 11
4 14 -1 6 11

# w  — xs + 5y - z = 9 
1 -1 5 -1 9

# -4w + 2x — 6y + z = —2 
-4 2 -6 1 -2