How do you solve log_(2) (5x + 7) - log_(2) x = 2?

1 Answer
De Rono
Nov 2, 2015

x = -7

Explanation:

Note that

log_2 (5x+7)- log_2 x =2
implieslog_2 (5x+7)+ log_2 (1/x)=2
implies log_2((5x+7)/x)=2
implies (5x+7)/(x)= 2^2
implies 5x+7 =4x
implies x = -7

Related questions
See all questions in Logarithmic Models
Impact of this question
2094 views around the world
You can reuse this answer
Creative Commons License