Pleasee bantu jawab, pake cara

[tex](fog)(x)=3( \frac{4x-5}{2x+1} )+4 \\ (fog)(x)= \frac{12x-15}{2x+1}+4 \\ (fog)(x)= \frac{20x-11}{2x +1} \\ y= \frac{20x-11}{2x+1} \\ 2xy+y = 20x -11 \\ 20x-2xy= y+11 \\ x(20-2y)= y+11\\ x= \frac{y+11}{-2y + 20} \\ (fog) ^{-1} (x)= \frac{x+11}{-2x+20},x \neq 10 [/tex]