To find the inverse of a function, switch the variables and solve for y.
Remember that when something says f(x) you can replace it with y.
This is the equation to solve for the inverse
x = 4 / (y + 2)
x(y + 2) = 4
y + 2 = 4 / x
y = 4 / x - 2
Make common denominators
y = 4 / x - 2x / x
y = 4 - 2x / x
y = 2(2 - x) / x
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