Em tham khảo nha:
\(\begin{array}{l}
(5a - 2b)F{e_x}{O_y} + (18ax - 6bx - 2ay)HN{O_3} \to x(5a - 2b)Fe{(N{O_3})_3} + (3x - 2y){N_a}{O_b} + (9ax - 3bx - ay){H_2}O\\
x(5a - 2b)\, \times |F{e^{ + \dfrac{{2y}}{x}}} \to F{e^{ + 3}} + (\dfrac{{3x - 2y}}{x})\\
a(3x - 2y)\, \times |{N^{ + 5}} + (\dfrac{{5a - 2b}}{a}) \to {N^{ + \dfrac{{2b}}{a}}}
\end{array}\)