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How to write the inverse of 3x+4y=12 in f^-1 (x)?
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How to write the inverse of 3x+4y=12 in f^-1 (x)?

User RomanMitasov
by
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1 Answer

5 votes
3x+4y=12

4y=12-3x

y=(12-3x)/4 <---------- This is f(x)

---------------------

3x+4y=12

3x=12-4y

x=(12-4y)/3

Therefore:

f⁻¹(x)=(12-4x)/3

=[4(3-x)]/3
User Pbies
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