What operations never change the solution set of an equation

3. solve by graphing: y = 2x + 6 x + y = -3

Afunction is given: f(x)=3x+12 a. determine the inverse of this function and name it g(x) b. use composite functions to show that these functions are inverses. c. f(g(– explain: what is the domain?

Write a corresponding real world problem to represent 2x - 125=400