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 2501 views around the world You can reuse this answer Creative Commons License