线性规划：Slack Form maximize 2x1-3x2+3x3 subject to x1+x2- X3 ≤ 7 -x1- X2 + X3 -7 x1-2x2 +2x3 4 x1,X2,x3 ≥ 0. L= 2x1 -3x2 + 3x3 X4= 7 X1 X2 X3 X5 -7 x1 X2 X3 X6 4 X1 2x2 2x3线性规划：Slack Form