Systems of Linear Equations in Three Variables
An equation such as x 2y - 3z = 9 is called a linear equation in three variables. In general, any equation of the formAx By Cz = Dwhere A, B, C, and D are real numbers such that A, B, and C are not all 0, is a linear equation in the variables x, y, and z. The graph of this linear equation in
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