Question 1118903
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The formal algebraic process for finding the inverse of a function shown by the other tutor is something that is useful to know.<br>
However, for simple functions like these, it is also instructive to find the inverses by using the understanding that an inverse function "un-does" what the function does.  So an inverse function performs the opposite operations and in the opposite order, compared to the original function.<br>
For your first example....<br>
f(x) = 4x+2<br>
The function (1) multiplies the input by 4 and (2) adds 2.
The inverse function must (1) subtract 2 and (2) divide by 4:
{{{y = (x-2)/4}}}<br>
The second example is even easier.  The second function only multiplies the input by 3; the inverse function only has to divide its input by 3:
{{{y = x/3}}}