Which of the following equations has a solution of x = 12?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Solving algebraic equations 2m+3=11

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?