The system of equations may have a unique solution, an infinite number of solutions, or no solution. Use matrices to find the ge
neral solution of the system, if a solution exists. (If there is no solution, enter NO SOLUTION. If there are infinitely many solutions, express your answers in terms of z as in Example 3.) 5x + 4y + 5z = −1 x + y + 2z = 1 2x + y − z = −3