Question

linear systems with three variables
2x+5y=-8
3x-4y+z=16
x+3y+2z=5

solve for x, y and z

Answer 1

If you use elimination on equations 2, and 3 to eliminate the z component; you will obtain an equation in x, and y.

You will then have 2 equations in x, and y: you can perform elimination on either of those variables to solve for them as normal. Once you have the values of x, and y; you can substitute them into one of the equations with x, y, and z to solve for z.

Answer 2

thank you :)