Related Post: 1 2 1 0 2 4 1 2 0 4 2 3 1 4x 2 1 2x 2 0 3x 1 2 4 X 1 2 0 Solve X 1 2 4 X 1 2 0 Using Substitution U Z 2 1 2 4 Z 1 2 0 0 4 X 1 2 )+ 1 6x =- 2