Question

y=2x+1 find an equation for the inerverse relation

Answer 1

this says multiply by 2, add 1. inverse is subtract 1, divide by 2
\[y=\frac{x-1}{2}\]

Answer 2

or write
\[x=2y+1\] and solve for y
\[x=2y+1\]
\[x-1=2y\]
\[\frac{x-1}{2}=y\]