Number of Solutions of a System of Three Linear Equations
When graphing a system of three linear equations with three variables, each equation is represented by a plane in three-dimensional space. The solutions to the system depend entirely on how these three planes intersect, resulting in three possible cases: 1) One solution: The three planes intersect at exactly one common point. 2) Infinitely many solutions: All three planes intersect along a single shared line, or they perfectly coincide as the exact same plane. 3) No solution: The planes do not share any common points across all three equations (for example, if they are parallel).
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In a professional budget analysis, if a system of linear equations is described as 'consistent', which of the following must be true about its solutions?
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