Using the Nonhomogeneous Principle determine the solution set W for the associated homogeneous systems in Problems 1-3. Then write the solutions to the systems in the original problems is the form x̅ = x̅h + x̅h, where x̅h ( W?
1. x + y = 4
x - y = 0
2. y = 2x
y = x + 3
3. x + y + z = 0
y + z = 1