Question

what is the inverse of f(x)=-2x+7

Answer 1

x-7/-2=f-1(x)

Answer 2

y = -2x + 7
x = 7 - y
----
2
f(-1)x = (7-x) / 2

Answer 3

2 or -2?

Answer 4

both are correct
(7-x) / 2 is same as (x-7)/-2
( i dont like negatives!)

Answer 5

f(x)=-2x+7
2x = -y + 7
->x = (-y + 7)/2
=> f^-1 (x) = -x/2 + 7