9.2 Systems of Equations in Three Variables
Solve systems of linear equations in three variables.
Use systems of three equations to solve applied problems.
Model a situation using a quadratic function.
A linear equation in three variables is an equation equivalent to one of the form , where A, B, C, and D are real numbers and none of A, B, and C is 0. A solution of a system of three equations in three variables is an ordered triple that makes all three equations true. For example, the triple is a solution of the system of equations
We can verify this by substituting 2 for x, for y, and 0 for z in each equation.
Solving Systems of Equations in Three Variables
We will solve systems ...
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