Question

Find F^-1 of the equation F(x)=2x+3

Answer 1

To find the inverse, as you want to, swap x and y.
\[y = 2x+3 \]
\[x = 2y+3 \]
\[x-3 = 2y\]
\[y = \frac x2 - \frac 32\]

Answer 2

ok awesome thank you!