How do you solve #log(x+10)-log(x+4)=logx#? Precalculus Solving Exponential and Logarithmic Equations Logarithmic Models 1 Answer Konstantinos Michailidis Feb 25, 2016 It is #x=2# Explanation: It is #log(x+10)-log(x+4)=logx=>log[(x+10)/(x+4)]=logx=> (x+10)/(x+4)=x=>x+10=x*(x+4)=> x^2+4x-x-10=0=> x^2+3x-10=0=> x_1=2 or x_2=-5# But hence #x>0# the only acceptable solution is #x=2# Answer link Related questions What is a logarithmic model? How do I use a logarithmic model to solve applications? What is the advantage of a logarithmic model? How does the Richter scale measure magnitude? What is the range of the Richter scale? How do you solve #9^(x-4)=81#? How do you solve #logx+log(x+15)=2#? How do you solve the equation #2 log4(x + 7)-log4(16) = 2#? How do you solve #2 log x^4 = 16#? How do you solve #2+log_3(2x+5)-log_3x=4#? See all questions in Logarithmic Models Impact of this question 5594 views around the world You can reuse this answer Creative Commons License