Certificate for #5543 ⟨a, b, c | ab=c, acbc=a⟩

Completion settings:

[1] c=ab

Axiom: ab=c.

Flip LHS and RHS.

Defines rule #2.

Referenced by [2].

[2] aabbab=a

Axiom: acbc=a.

Reduce LHS:

[1]a(c)bc
[1]⇒ aabb(c)
⇒ aabbab

Defines rule #1.