Question

Solve the following system of equations.

3x + 3y + 2z = –5
x + y + 3z = –4
2x + 2y + 5z = –7

(–4, –3, 1)
(–4, 3, –1)
(4, –3, –1)
(–4, –3, –1)

Answer 1

Instead of solving such a large system, why don't you try plugging in some of the answers given?

Answer 2

I'm assuming it could perhaps be B, and I haven't even touched a pencil.

Do you see why?