(x+3)/(x+1)=1 now I'm stuck
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log((x+3)/(x+1))=1. If log is to base 10, (x+3)/(x+1)=10, so x+3=10x+10, 9x=-7, x=-7/9.

If the log base is b, x+3=bx+b, x=(3-b)/(b-1). Example: if b=2, x=1.
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