Answer
The final answer is $ 11x+4y=-3 $.
Work Step by Step
The given equations are
$ 5x-2y-4z=3 $ ... (1)
$ 3x+3y+2z=-3 $ ... (2)
Multiply the equation (2) by $2$.
$ 2\cdot 3x+2\cdot 3y+2\cdot 2z=-2\cdot 3 $
$ 6x+6y+4z=-6 $ ... (3)
Add equation (1) and (3).
$ 5x-2y-4z+6x+6y+4z=3-6 $
Add like terms
$ 11x+4y=-3 $.
