The second tableau is the following.
x | y | z | s | t | u | p | Ans | ||
z | 7 | 0 | 1 | 1 | 0 | 0 | 0 | 6 | |
t | 1 | 2 | 0 | 0 | 1 | 0 | 0 | 20 | |
u | 28 | 3 | 0 | 4 | 0 | 1 | 0 | 6 | |
p | 20 | -2 | 0 | 3 | 0 | 0 | 1 | 18 |
The most negative number in the bottom row is the 2, so the pivot column is the "y"-column (shown in color above). For the pivot, we must choose between the 2 and the 3 in that column (0 can't be a pivot). The test ratio for the 2 is 20/2 = 10, while the test rtio for the 3 is 6/3 = 2. Since this is the smaller test ratio, we choose the 3 as the pivot:
x | y | z | s | t | u | p | Ans | |||
z | 7 | 0 | 1 | 1 | 0 | 0 | 0 | 6 | ||
t | 1 | 2 | 0 | 0 | 1 | 0 | 0 | 20 | 3R_{2} 2R_{3 } | |
u | 28 | 3 | 0 | 4 | 0 | 1 | 0 | 6 | ||
p | 20 | -2 | 0 | 3 | 0 | 0 | 1 | 18 | 3R_{4 }+ 2R_{3 } |
x | y | z | s | t | u | p | Ans | ||
z | 7 | 0 | 1 | 1 | 0 | 0 | 0 | 6 | |
t | 59 | 0 | 0 | 8 | 3 | 2 | 0 | 48 | |
y | 28 | 3 | 0 | 4 | 0 | 1 | 0 | 6 | |
p | 4 | 0 | 0 | 1 | 0 | 2 | 3 | 66 |
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