How do you solve this equation 3^3x-7=81^12-3x

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asked Mar 16, 2018 81.3k views

4 votes

How do you solve this equation 3^3x-7=81^12-3x

Mathematics
high-school

MuneebShabbir asked

by MuneebShabbir

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1 Answer

7 votes

I think you meant...

3^(3x-7)=81^(12-3x) (note that 81=3^4) so

3^(3x-7)=3^4^(12-3x)

3^(3x-7)=3^(48-12x) taking log or natural log of both sides show that

3x-7=48-12x

15x=55

x=11/3

Agnaramon answered Mar 22, 2018

by Agnaramon

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