How do you solve #7 + logx = 4#? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer Nam D. Mar 3, 2018 #x=1/1000=0.001# Explanation: #logx+7=4# #=>logx=-3# #=>x=10^-3# #=>x=1/10^3# #=>x=1/1000# If you want to write it as a decimal, that'll be #0.001#. Answer link Related questions What is the common logarithm of 10? How do I find the common logarithm of a number? What is a common logarithm or common log? What are common mistakes students make with common log? How do I find the common logarithm of 589,000? How do I find the number whose common logarithm is 2.6025? What is the common logarithm of 54.29? What is the value of the common logarithm log 10,000? What is #log_10 10#? How do I work in #log_10# in Excel? See all questions in Common Logs Impact of this question 2325 views around the world You can reuse this answer Creative Commons License