How are problems like this solved \(\log_7 (4x+1) + \log_5 (5x+3) = 4\)

I know how to use change of base formula but in solving exponents involving logarithms (e.g. \(a^{\log_b (2x+y)} \)) I get stucked.

How are problems like this solved \(\log_7 (4x+1) + \log_5 (5x+3) = 4\)

I know how to use change of base formula but in solving exponents involving logarithms (e.g. \(a^{\log_b (2x+y)} \)) I get stucked.

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TopNewestThere is no exact form of \(x\). You can only use approximation/numerical methods to get \(x \approx 7.06\). – Pi Han Goh · 9 months, 3 weeks ago

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