Ononot — A system of linear equations A\mathbf{x} = \mathbf{b} has th

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Linear Systemshard

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A system of linear equations $A\mathbf{x} = \mathbf{b}$ has the property that the solution set is a 2-dimensional affine subspace of $\mathbb{R}^5$ (geometrically, a plane). What is rank $(A)$ if $A$ has 5 columns?