Solve the following systems of linear equations. x1 + x2 − 2x3 + 3x4 + 2x5 = 6 3x1 + 3x2 − x3 + x4 + x5 = 12 2x1 + 2x2 − x3 + x4 − 2x5 = 5 4x1 + 4x2 + x3 − 3x5 = 16 8x1 + 5x2 − 2x3 − x4 + 2x5 = 29