To find the active variables, look for the columns that are "cleared" (all zeros except for a single entry). In the given tableau, these columns are the "s", "t", "u", and "p" columns. The other variables, 'x", "y", and "z" are inactive (their columns are not cleared) so we set them equal to zero. The values of the active variables are calculated below.

x	y	z	s	t	u	p		Ans
7	0	1	1	0	0	0		6	s = 6/1 = 6
1	2	0	0	1	0	0		20	t = 20/1 = 20
0	3	4	0	0	1	0		30	u = 30/1 = 30
1	2	3	0	0	0	1		0	p = 0/1 = 0
									x = 0, y = 0, z = 0 (incative)

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