Question 128852
{{{f(x) = -4 + x }}} Start with the given function



{{{x = -4 + f(x) }}} Swap the x and f(x) variables



{{{x+4 = f(x) }}} Add 4 to both sides to isolate f(x)



So the inverse function is {{{f^(-1)(x)=x+4 }}}