(5^x)*10^3x=8^x
5^x*2^3x*5^3x=8^x
5^4x*8^x=8^x
5^4x=1
x=0
2^(x+1)=3^(2x+1)
2^x*2=3^2x*3
(2/9)^x=3/2
x=log(2/9)(3/2)
x=(log3-log2)/(log2-log9)