Question

f(x)=2x+2 and fog(x)=8x+13 find the value of x such that go(fx)=20

Answer 1

Answer:

f(x)=2x+2

fog(x)=8x+13........(1)

fog(x)=20...............(2)

equate

8x+13=20

8x=20-13

x=7/8

hence the value of x is 7/8