Mohon bantuannya cara mengerjakan soal ini

KESETIMBANGAN [XI]

    A + 2B ⇔ C
m  x    4 mol 
b   1    2 mol  1 mol
s (x-1) 2 mol  1 mol

[tex]\displaystyle [A] = \frac{(x-1)}{5} \\ \displaystyle [B] = \frac{2}{5} = 0,4 \ M \\ \displaystyle [C] = \frac{1}{5} = 0,2 \ M \\ \\ Kc = \frac{[C]}{[A][B]^{2}} \\ 0,25 = \frac{0,2}{ \frac{(x-1)}{5} 0,4^{2}} \\ (x-1) = 25 \\ x = 26 \ mol \ (E) \ -\ \textgreater \ \ Jawab [/tex]