23=5+3log(4x)

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Subtract 5 from both sides 18 = 3log(4x) Make 3 the exponent of 4x 18 = log[(4x)^3] Take the antilog of both sides 10^18 = (4x)^3 Rewrite the left side so it is [(10^6)]^3 = (4x)^3 This means 10^6 = 4x x = 250,000