The number of bones in an adult body is approximately six more than 2/3 of the number in a newborns body. how many bones are in a newborns body if an adult has 206 bones?

Can someone me and do the problem plz so i can understand it more better

X2 + y 2 = 36 x + y = 6 solve the system of equations.

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample