Answer to Question #235888 in Operations Research for lavanya

Question #235888

Use simplex method to maximize 𝑓 = 3π‘₯ + 5𝑦 + 4𝑧 subject to the conditions 2π‘₯ + 3𝑦 ≀ 18 2π‘₯ + 5𝑦 ≀ 10 3π‘₯ + 2𝑦 + 4𝑧 ≀ 15 and π‘₯, 𝑦, 𝑧 β‰₯ 0. 


1
Expert's answer
2021-09-16T00:43:53-0400

Solution:

Assuming given variables x,y,z as x1, x2, x3 respectively.

Max Z=3x1+5x2+4x3

subject to

2x1+3x2≀18

2x1+5x2≀10

3x1+2x2+4x3≀15 and 

x1,x2,x3β‰₯0;

The problem is converted to canonical form by adding slack, surplus, and artificial variables as appropriate


1. As the constraint-1 is of type '≀' we should add slack variable S1


2. As the constraint-2 is of type '≀' we should add slack variable S2


3. As the constraint-3 is of type '≀' we should add slack variable S3


After introducing slack variables

Max Z=3x1+5x2+4x3+0S1+0S2+0S3

subject to

2x1+3x2+S1=18

2x1+5x2+S2=10

3x1+2x2+4x3+S3=15 and 

x1,x2,x3,S1,S2,S3β‰₯0



Similarly, going further, we get the third iteration:



Since all Zj-Cjβ‰₯0

Hence, optimal solution is arrived with value of variables as :

x1=0,x2=2,x3=2.75

Max Z=21


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