SOLUTION: I need help with this problem. I have solved it and I got the answer x-5/2 but its not listed as one of the answers and I do not know if I have solved it wrong or not. here is th

SOLUTION: I need help with this problem. I have solved it and I got the answer x-5/2 but its not listed as one of the answers and I do not know if I have solved it wrong or not. here is th

Algebra.Com

Question 326562: I need help with this problem. I have solved it and I got the answer x-5/2 but its not listed as one of the answers and I do not know if I have solved it wrong or not.
here is the problem:
if f(x)= 2x+5, then f-1(x)=
and the answers are:
a. (1/2)(x-5)
b.1/2x+5
c. -2x-5
d.(1/2x)-(5/2)
e.(1/2x)+5
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
y=2x+5

x=2y+5

x-5=2y

y = (x-5)/2

y = (1/2)(x-5)

Answer: A)
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