Question

What is the solution of the system of equations?

Answer 1

Using equations one and three can get you z directly by elimination.

Answer 2

explain please

Answer 3

Notice how in the first and third equation, they both have 3x+2y?
If you subtract one of those equations from the other, the x's and y's will cancel out leaving you a single equation with only z.

Answer 4

Know what I'm saying here, @isaiah993 ?
It's the same as using elimination for a system of two equations with two variables.

Answer 5

oh ok thanks