(Solved): The augmented matrix of a linear system has been reduced by row operations to the form ...

The augmented matrix of a linear system has been reduced by row operations to the form shown. Continue the appropriate row operations and describe the solution set of the original system. $?\begin{array}{ccccc}1& ?9& 0& 0& ?137\\ 0& 1& ?8& 0& 56\\ 0& 0& 1& ?2& 31\\ 0& 0& 0& 1& ?18\end{array}?$ No solution Infinite number of solutions Solve the system by using elementary row operations on the equations. Follow the systematic elimination procedure. $\{\begin{array}{ll}?8x_1?3x_2& =?14\\ 5x_1+0x_2& =20\end{array}$ Type your answer as an ordered pair. Solve the system below. Parameterize the solution set. $?\begin{array}{l}x+2y?z=?1\\ 2x+5y=?3\\ ?3x?3y+9z=0\end{array}$