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Mathematics 8 Online
OpenStudy (study_buddy99):

Log question please help?

OpenStudy (study_buddy99):

Solve: \[\log_43+\log_4(1-x)=\log_4(1+x)\]

OpenStudy (study_buddy99):

I believe my first step would be to cancel out one of the log_4

OpenStudy (study_buddy99):

\[\log_43(1-x)=(1+x)\]

Nnesha (nnesha):

no first you need to get the right side as single log are you familiar with log properties ?

OpenStudy (anonymous):

\[\log_{a} b+\log_{a} c=\log_{a} bc\]

OpenStudy (study_buddy99):

okay soo \[\log_4(1-x)(1+x)\]

OpenStudy (study_buddy99):

log_4(1-x)(1+x)(3)

OpenStudy (anonymous):

\[\log_{4} 3\left( 1-x \right)=\log_{4} \left( 1+x \right)\]

OpenStudy (study_buddy99):

oh that's right...

Nnesha (nnesha):

\[\large\rm \log_b x + \log_b y= \log_b (xy)\] i believe you already applied this rule now you can cancel out the log \[\large \rm \log_43(1-x)= log_{4}(1+x)\]

OpenStudy (study_buddy99):

so then I get \[3(1-x)=(1+x)\]

Nnesha (nnesha):

looks good solve for x

OpenStudy (study_buddy99):

\[3-3x=1+x\] \[2=4x\] \[x=1/2\]

Nnesha (nnesha):

looks good. good job

OpenStudy (study_buddy99):

yay, thank you so much!

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