Solve the system at right for (x, y, z). Homework Help ✎
2x + y − 2z = 0
x − y − 4z = −3
3x + 2y + 2z = −1
Add the first and second equation to eliminate the y-term.
Multiply the second equation by 2 and then add it to the last equation.
Use your equations from Steps 1 and 2 to solve a system with x and z.
Then use your x- and z-values to solve for y in any of the three given equations.