log4(x-1)=log2(x-3) is
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log4(x-1)=log2(x-3)
log(4x-4)=log(2x-6)
log(4x-4)-log(2x-6)=0
⇒ (4x-4)/(2x-6)=0
4x-4=0
⇒ 4x=4
⇒x=1
=
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