Question 1097369
This was already answered.



What is f?
started with x, multiplied by 5, added 4, divided by 7.


The inverse is the undoing of all that.
{{{f^-1(x)=((x)*(7)-4)/5}}}------{{{f^-1(x)=(7x-4)/5}}}


OR  


{{{(5y+4)/7=x}}}

{{{5y+4=7x}}}

{{{5y=7x-4}}}

{{{y=(7x-4)/5}}}