Question

inverse of the function y = 3x + 7

Answer 1

y = 3x + 7

y-7 = 3x

(y-7)/3 = x

// just move x to the left

x = (y-7)/3

replace all y's for x's and all x's for y's

Answer 2

*replace the x with y^-1 and replace the y with x

After, make the y^-1 subject