Question

What is the solution to the system of equations?

{x + 3y + 2z = 8
{3x + y + 3z = -10
{-2x -2y - z = 10
A: (-10, -2, 6)
B: (10, 2, 6)
C: (-10, 2, 6)
D: (-10, 2, -6)

Answer 1

The answer is C. You can solve these by plugging in and checking if each equation is true with the given answers. Also, you can solve by using elimination to get one of the variables removed. Then when you have two, two-variable problems, you can solve that system in any of the ways.