Answer:
5=x
Step-by-step explanation:
f(4)= f(x)
so, f(4)=(x-1)
then you just view the problem as, 4=x-1
so, 4+1=x because you need to get the x by itself so you have to move the 1 so it is with the 4. to get it to the other side you have to add it since is is being subtracted from the x. which makes it 5=x.
