Node 2: -17v₂ + 5v₃ + 10v₅ = -400

Node 3: 2v₂ - 3v₃ + v₄ = 0

Node 4: 3v₃ - 7v₄ + 4v₅ = 0

Node 5: 6v₂ + 2v₄ - 9v₅ = 0