Question

solve 12^x-2= 20 (use log)

Answer 1

"x-2" is the exponent ?

Answer 2

yes

Answer 3

\(\LARGE\color{blue}{ \bf 12^{x-2}= 20 }\)


\(\LARGE\color{blue}{ \bf log~12^{x-2}= log~20 }\)


\(\LARGE\color{blue}{ \bf (x-2) log~12= log~20 }\)


\(\LARGE\color{blue}{ \bf (x-2) = log~20/log~12 }\)


\(\LARGE\color{blue}{ \bf x = 2+log~20/log~12 }\)


\(\LARGE\color{blue}{ \bf x = 2+log_{12}~20 }\)

can you do it from here ?

Answer 4

no lol

Answer 5

i tried

Answer 6

you can use the calculator to solve

\(\LARGE\color{blue}{ \bf log_{12}~20 }\) and then finish off by adding the right side,

http://www.1728.org/logrithm.htm


or do you need exact answer in terms of log ?

Answer 7

solve for x
i need it rounded to the nearest ten thousandth

Answer 8

http://www.wolframalpha.com/input/?i=12%5Ex-2%3D20+simplify

Answer 9

thats wrong wolfram