3.5 – Solving Systems of Equations in Three Variables
Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 2x – y + 3z = - 5
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 2[2x – y + 3z = - 5]
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 2[2x – y + 3z = - 5] x + 2y + z = 10 4x – 2y + 6z = -10
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 2[2x – y + 3z = - 5] x + 2y + z = 10 4x – 2y + 6z = -10 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 2[2x – y + 3z = - 5] x + 2y + z = 10 4x – 2y + 6z = -10 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 2[2x – y + 3z = - 5] x + 2y + z = 10 4x – 2y + 6z = -10 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 102x – y + 3z = - 5 2[2x – y + 3z = - 5]2x – 3y – 5z = 27 x + 2y + z = 10 4x – 2y + 6z = -10 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 102x – y + 3z = - 5 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 4x – 2y + 6z = -10 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 -3[2x – y + 3z = - 5] 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 4x – 2y + 6z = -10 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 -3[2x – y + 3z = - 5] 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 -6x + 3y – 9z = 15 4x – 2y + 6z = -10 2x – 3y – 5z = 27 5x + 7z = 0
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 -3[2x – y + 3z = - 5] 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 -6x + 3y – 9z = 15 4x – 2y + 6z = -10 2x – 3y – 5z = 27 5x + 7z = 0 -4x – 14z = 42
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 -3[2x – y + 3z = - 5] 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 -6x + 3y – 9z = 15 4x – 2y + 6z = -10 2x – 3y – 5z = 27 5x + 7z = 0 -4x – 14z = 42
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 -3[2x – y + 3z = - 5] 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 -6x + 3y – 9z = 15 4x – 2y + 6z = -10 2x – 3y – 5z = 27 5x + 7z = 0 -4x – 14z = 42
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27 x + 2y + z = 10 -3[2x – y + 3z = - 5] 2[2x – y + 3z = - 5] 2x – 3y – 5z = 27 x + 2y + z = 10 -6x + 3y – 9z = 15 4x – 2y + 6z = -10 2x – 3y – 5z = 27 5x + 7z = 0 -4x – 14z = 42
5x + 7z = 0 -4x – 14z = 42
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 5(7) + 7z = 0
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 5(7) + 7z = z = 0
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 5(7) + 7z = z = 0 - 7z = -35
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 5(7) + 7z = z = 0 7z = -35 z = -5
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 5(7) + 7z = z = 0 7z = -35 z = -5
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27
3.5 – Solving Systems of Equations in Three Variables Ex. x + 2y + z = 10 2x – y + 3z = - 5 2x – 3y – 5z = 27
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = z = 0 7z = -35 z = -5
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = y – 5 = z = 0 7z = -35 z = -5
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = y – 5 = z = 0 2y + 2 = 10 7z = -35 z = -5
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = y – 5 = z = 0 2y + 2 = 10 7z = -35 2y = 8 z = -5
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = y – 5 = z = 0 2y + 2 = 10 7z = -35 2y = 8 z = -5 y = 4
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = y – 5 = z = 0 2y + 2 = 10 7z = -35 2y = 8 z = -5 y = 4
5x + 7z = 0 -4x – 14z = 42 2[5x + 7z = 0] -4x – 14z = 42 10x + 14z = 0 -4x – 14z = 42 6x = 42 x = 7 5x + 7z = 0 x + 2y + z = 10 5(7) + 7z = y – 5 = z = 0 2y + 2 = 10 7z = -35 2y = 8 z = -5 y = 4 (7,4,-5)