21. Solve 4log x = 32 - xlog 4 (using base 10)
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Answer:
4^log x = 32 - x^log 4 (x^log 4 = 4^log x)
4^log x = 32 - 4^log x
2×4^log x = 32
4^log x = 16 (4² = 16)
log x =2
x = 10²
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