Kemija - 2010./11. ljeto - 33.

$3\mathrm{A}+\mathrm{C}\to 2\mathrm{B}3\; ~\backslash mathrm\{A\}+\backslash mathrm\{C\}\; \backslash rightarrow\; 2\; ~\backslash mathrm\{B\}$

$2\mathrm{B}\to 3\mathrm{A}+\mathrm{C}2\; \backslash mathrm\{~B\}\; \backslash rightarrow\; 3\; \backslash mathrm\{~A\}+\backslash mathrm\{C\}$

$\mathrm{A}+3\mathrm{C}\to 2\mathrm{B}\backslash mathrm\{A\}+3\; ~\backslash mathrm\{C\}\; \backslash rightarrow\; 2\; ~\backslash mathrm\{B\}$