Question

Please solve this question answer

Answer 1

f(x)=2x-5, g(x)=7-4x

fx=gx

2x-5=7-4x

6x=12

x=2

2)

let y=2x-5

x=(y+5)/2,

f^-1(x)=(x+5)/2

let z=7-4x

x=(7-z)/4

g^-1(x)=(7-x)/4

f^-1(x)=g^-1(x)

(x+5)/2. =(7-x)/4

2(x+5)=7-x

2x+10=7-x

3x=-3

x=-1