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Solving a Logarithmic Equation with Multiple Logs  Problem 4
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
One strategy for solving equations with multiple logs is to get them on the same side of the equation and combine them into one single log. From there, if you have log x=log y, then x = y and you can solve. Don't forget to check for extraneous solutions: whatever you put into a log function must be greater than zero!
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Sample Problems (5)
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Solving a Logarithmic Equation with Multiple Logs
Problem 1 11,559 viewsSolve:
log_{7}(x + 5) − log_{7}(x − 1) = log_{7}3 
Solving a Logarithmic Equation with Multiple Logs
Problem 2 9,062 viewsSolve:
log_{2}x + log_{2}(x + 4) = 5 
Solving a Logarithmic Equation with Multiple Logs
Problem 3 7,759 viewsSolve:
log_{2}3 + log_{2}x = log_{2}(x − 2) + log_{2}(x + 2) 
Solving a Logarithmic Equation with Multiple Logs
Problem 4 2,216 views 
Solving a Logarithmic Equation with Multiple Logs
Problem 5 2,070 views
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