Hello there, i received my exam back i got this question wrong well there is two of them maybe someone could show me how to do it?

1)logE=log(10.61)+0.1964logm ----------- E= Eye axial length m= body mass in kilograms if E = 31 solve for m round to closest kilogram i got 8.57 and it was wrong.

2)log36^5x=log216^x-7------------------solve for x ( what i tried doing was bringing the exponents down through the power law and solve using quotient rules and it was wrong

any help would be appreciated.