SOLUTION: Hi, please help me solve these: 7^x + 7^(x-1) = 8^x 5^x + 0,2^x = 5,2 Thank you

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Hi, please help me solve these: 7^x + 7^(x-1) = 8^x 5^x + 0,2^x = 5,2 Thank you      Log On


   

Question 892195: Hi, please help me solve these:
7^x + 7^(x-1) = 8^x
5^x + 0,2^x = 5,2
Thank you
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
7^x + 7^(x-1) = 8^x
has to be x=1, then you have
7 + 1 = 8, remember any no.to the power of 0 = 1
:
5^x + 0.2^x = 5.2
same here x=1
5 + .2 = 5.2