SOLUTION: Given {{{2^x=8^(y+1)}}} and {{{9^y=3^(x-9)}}}, find the values of x+y.

SOLUTION: Given {{{2^x=8^(y+1)}}} and {{{9^y=3^(x-9)}}}, find the values of x+y.

Algebra.Com

Question 468345: Given and , find the values of x+y.
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!
From the first equation

So,
From the second equation

System

,
Subtract the second equation from the first one

Put in the first equation

Answer: 27
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