(Innovation Extension) known {X-Y + 2 > = 0, x + y-4 > = 0,2x-y-5

(Innovation Extension) known {X-Y + 2 > = 0, x + y-4 > = 0,2x-y-5

Find the intersection a (1,3) B (3,1) C (7,9)
Z=X+2Y-4
∴y=(-x/2)+(4+z)/2
∴b=(4+z)/2
∵ B is the longitudinal intercept of the line y = (- X / 2) + (4 + Z) / 2
The smaller B is, the smaller Z is
∵ B min
∴3+2-4-z=0
∴Zmin=1