Section 4.2 Solving Systems of Linear Equations in 3 Variables.
Section 4.2 Solving Systems of Linear Equations in 3 Variables. Small differences… This time, the solution is an ordered triple: (x, y, z). EX: Is (2, -2, 1) a solution to: 3x + 2y + z = 3 2x – 3y – 2z = 8 -2x+ 4y + 3z = -9 To Solve (Elimination Method) Select 2 equations and multiply to get one variable to have opposite coefficients. Add to eliminate that variable. Select 2 DIFFERENT equations and eliminate the same variable. Solve for the 2 remaining variables using methods from section 4.1. Substitute the values just found into any of the original equations and solve for the 3rd variable.