To find the inverse, interchange the variables
so the Answer is 4 - 1 (x) = - 5 + 2x well thats your answer Hope this helps :)
Step 1:Replace f (x) with y
so y = x + 5 and the denominator 2
Step 2:Interchange the Variables x = y + 5 but the denominator stays the same
Now solve for y
since y is on the right of the equation switch sides so its on the left side
Step 3:y + 5 and the denominator 2 equals x
Step 4: Still solve for y Which is y = - 5 + 2x
Step 5: Solve for y and replace with 4 - 1 (x) to show the final Answer
Now the Answer is 4 - 1 (x) = - 5 + 2x