Find the inverse of f(x) = 9+12x/3, if it exists. Enter any noninteger coefficient as a fraction. If there is no inverse, enter "none".

f to the -1 power(x)=

f(x)= 9 + 12x/3

replace f(x) and x in equation and solve for f(x)

x=9+12f(x)/3

3x=27+12f(x)

3x/12=27/12+f(x)

f(x)=x/4-9/4

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