Text 1: Solve the system using either Gaussian elimination with back-substitution or Gauss-Jordan elimination. (If there is no solution, enter NO SOLUTION. If the system has an infinite number of solutions, express x, y, z, and w in terms of the parameters t and s.)
4x + 12y − 7z − 20w = 26
3x + 9y − 5z − 28w = 34
Text 2: Solve the system of linear equations. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION. If the system has an infinite number of solutions, set w = t and solve for x, y, and z in terms of t.)
x + y + z + w = 6
2x + 3y − w = 1
−3x + 4y + z + 2w = 1
x + 2y − z + w = 4
Please solve both.