Subtracting 12.
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subracting 4
12 and 4
You can do reverse operation to check. If you checked it and it is not the answer you got, try the problem and recheck it to see if your right.
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
Adding zero to any number exemplifies the identity property of addition. For example, 12 + 0 = 12 where adding zero does not change the sum.