Determine the value of k so that the following system of linear equations has infinitely many solutions and then find the solutions: 
Definitions:
Phloem
The vascular tissue in plants that transports sugars and other metabolic products from leaves to other parts of the plant.
Parenchyma
A type of plant tissue comprised of living cells that are often soft and fleshy, involved in photosynthesis, storage, and transport.
Trichomes
Small hair-like appendages on plants that serve various functions including defense against insects and reducing water loss.
Collenchyma
A type of plant tissue characterized by its living, elongated cells with unevenly thickened walls that provide structural support.
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