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# C2 Log's help! watch

1. What is log(base2)(x-1)-log(base2)x=log(base2)7

2. (Original post by Kunster1337)
What is log(base2)(x-1)-log(base2)x=log(base2)7

log_2(x-1) - log_2(x) = log_2(7)
log_2((x-1)/x) = log_2(7)
(x-1)/x = 2^(log_2(7))
(x-1)/x = 7
x-1=7x
-1=6x
x=-1/6

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