243 because if you divide and subtract it would culminate to the amount of people
Here is how we get the answer....
First, replace f(x) with y . ...
Replace every x with a y and replace every y with an x .
Solve the equation from Step 2 for y . ...
Replace y with f−1(x) f − 1 ( x ) . ...
Verify your work by checking that (f∘f−1)(x)=x ( f ∘ f − 1 ) ( x ) = x and (f−1∘f)(x)=x ( f − 1 ∘ f ) ( x ) = x are both true.
It will be 69 degrees.
(x-1)+x+43=180
2x+42=180
2x=138
x=69
Refer the attachment for your answer :)
