Which operation is the inverse of R2→R2+5R1R_2 \to R_2 + 5R_1R2→R2+5R1?
R2→R2+5R1R_2 \to R_2 + 5R_1R2→R2+5R1
R2→R2−5R1R_2 \to R_2 - 5R_1R2→R2−5R1
R1→R1−5R2R_1 \to R_1 - 5R_2R1→R1−5R2
R2→R2×15R_2 \to R_2 \times \frac{1}{5}R2→R2×51