Question: How do we find this second constraint using duality theory ? Primal problem : max x1 + 3x2 s.t. x1 + 2x2 = 0 And

How do we find this second constraint using duality theory ?

Primal problem :

max x1 + 3x2

s.t. x1 + 2x2 <= -2

x1 >= 0

And the dual problem according to my teacher is :

Min -2y1

st y1>=1

2y1=3

y1>=0

How does he finds the bold equation ?

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