11*3^x = 5*7^x
log(11*3^x)=log(5*7^x)
log(11)+log(3^x)=log(5)+log(7^x)
log(11)+x*log(3)=log(5)+x*log(7)
x*[log(7) -log(3)]=log(11)-log(5)
x*(0.84509804 -0.477121254)= 1.041392685 -0.698970004
0.367976786x=0.342422681
x=0.3424.../0.36797...
x=0.930555116