Question 446792
1n (x+7) + 1n (x+3) = 1n77
ln x + ln 7 + ln x + ln 3 = ln 77 ****** Problem here
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2 ln x + ln 7*3 = ln77
2 ln x = ln 77 - ln 21
ln x^2 = ln 77/21
x^2 = 77/21
x = sqrt (77/21)
x = 1.915
x must be positive as you can't have negative ln.