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Can someone explain to me how to do inverse functions

Like is there a formula for turning a function into an inverse function

here is one that i cant make sense of

 

4(x+3) − 5

 Jun 3, 2020
edited by gvcarden  Jun 3, 2020
 #1
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 y= 4x+12-5 = 4x + 7       change the x to y  and the y  to x      of the original function then solve for y

 

y = 4x+7     switch the x 's and y 's

x = 4y+ 7    now solve for y

x-7 = 4y

y  = (x-7)/4      this is the inverse  

 Jun 3, 2020

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