21. SHOW YOUR WORK Solve the system of equations in three variables: x - 3y + 2z == 10 2xy + 3z =- 9 - x - y + z =- 1

Use the inverse of 1 -4 -7 -1 -1 2 -1 5 X₁ + 2x₂x3 = -3 = 3 (X₁₁ X₂ X3) = -4x₁7x₂ + 7x3 -X₁ - X2 + 5x3 = -2 to find the solutions to the linear system below.

7) y = -2x - 3 -4x - 4y = 4 Solving Systems of Equations using Substitution

What are the x -coordinates for the solutions to this system of equations? (x² + y² = 25 x-y= 5 () X = -5 and x= 0 Ox = 2 and x = -3 0 X =5 and x = 0 Ox =3 and x = 4

I am stuck on this question. I have found z which equals -5 but have been unable to find x or y.