Elementary Algebra Questions

Need help answer a question below to college Algebra Help??
The question is: Elementary row operations used to write the matrix below the line as Echelon. [1 1 7 6 2 -2 -6 20 3 1 13 14] Could you if you please tell me how to reach this very important thanks claculator
I really do not have the kind of step by step, but we want the final answer here:) [1 0 0 16 18 0 0 1 0 0 1 -4] oh if I know you can do with calculator with a few button presses.
ACT Math Test: Elementary Algebra Problem

