Need help with this if you can explain please do if not then just and answer is okay

Step-by-step explanation:

f(x) = x / (x - 7) = 1 + 7 / (x - 7).

The domain of f(x) depends whether the denominator of the rational expression is non-zero.

When (x - 7) = 0, x = 7.

Hence domain of f(x)

= All real values of x excluding 7. (C)

C. All real values of sucth that x ≠ 7

Step-by-step explanation:

This is the answer because:

1) Set up the composite function and evaluate, then find the domain of the result.

Therefore, the answer is C.

Hope this helps! :D

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

x

step-by-step explanation: