K Kelly New member Mar 16, 2010 #1 i just can't seem to figure out how to solve this, and it's probably really easy x) log4(x-5) = -1 the 4 in the equation is log base 4. not like 4*(x-5)
i just can't seem to figure out how to solve this, and it's probably really easy x) log4(x-5) = -1 the 4 in the equation is log base 4. not like 4*(x-5)
T Tuyet New member Mar 16, 2010 #2 use the change over base rule. log4(x-5) = -1 step 1. 4^(-1) = x - 5 step 2. 1/4 = x - 5 step 3. (1/4) + 5 = x step 4. (1/4) + (20/4) = x step 5. 21/4 = x and that's all!
use the change over base rule. log4(x-5) = -1 step 1. 4^(-1) = x - 5 step 2. 1/4 = x - 5 step 3. (1/4) + 5 = x step 4. (1/4) + (20/4) = x step 5. 21/4 = x and that's all!
