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Expressing One Variable in Terms of Another

Algebra · Math Count PH 2025 1250
If $ 2^{3a - 1} = 9 $ and $ 3^{4b} = 8 $, express $ b $ in terms of $ a $.
A$\frac{3}{6a-2}$ B$\frac{3}{6a+2}$ C$\frac{\log_{18}{81}}{a}$ D$\frac{a}{\log_{18}{81}}$