Tentukan hp pera log(2x-1)-log(x-3)=log7

log(2x-1)-log(x-3)=log7   (jika ada alogb-alogc = alog(b/c)

log((2x-1)/(x-3))=log7     (hialangkan lognya)

(2x-1)/(x-3)=7

2x-1=7(x-3)

2x-1=7x-21

2x-7x=-21+1

-5x=-20

x=-20/-5

x=4