Write two linear functions, f(x) and g(x). for example, f(x) = 3x – 7 and g(x) = –2x + 5. then see whether f(x) – (–g(x)) is equivalent to f(x)+ g(x). hint: to find –g(x), just change the signs of all the terms in g(x). discuss whether you think your results would apply to every function.