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If f(x) = 4x + 12, to find the inverse, reverse the actions of the elements of the function in "reverse" order.

The last thing done is "+ 12", so reverse that first by "- 12"

The previous thing done was "× 4n, so reverse that by "÷ 4", but note that the divide takes precedence over subtract, so the previous step needs to be in brackets.

Thus if the inverse of f(x) is g(x), g(x) = (x - 12) ÷ 4

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Q: What is the inverse of f of x equals 4x plus 12?
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