Question #2cd37

Question

1357 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-12-17T18:36:41

Apply logarithms

#6^(x+9)=7^x

'Applying logarithms (remember that the dominion is (x+9>0 and x>0):

#(x+9)ln6=xln7#

#xln6-xln7=-9ln6#

#xln(6/7)=-9ln(6)#

#x=-(9ln(6))/ln(6/7)#

#x~-104.61#