Question 859838
What is the exponent of 3?  3x?  3x+1?
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If it's 3x+1,
7^x=3^3x+1
x*ln(7) = (3x+1)*ln(3)
x*ln(7) = 3x*ln(3) + ln(3)
x*(ln(7) - 3ln(3)) = ln(3)
x = ln(3)/(ln(7) - ln(27))
x = ln(3)/ln(7/27)
x =~ -0.813831