How do you solve #log (x+3)=1-logx#? Precalculus Solving Exponential and Logarithmic Equations Logarithmic Models 1 Answer P dilip_k Mar 11, 2016 #=>x=-5 and x=2# Explanation: #log(x+3)+logx =1# #=>log((x+3)xxx) =log10# #=>x^2+3x=10# #=>x^2+3x-10=0# #=>x^2+5x-2x-10=0# #=>x(x+5)-2(x+5)=0# #=>(x+5)(x-2)=0# #=>x=-5 and 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 5024 views around the world You can reuse this answer Creative Commons License