What is i'm having trouble in algebra

In this problem we are solving for the variable, which is x. 

First we have to subtract 6 from both sides. (Remember: Anything done on one side of the equation must also be done on the opposite side.)

Lastly, we have to get x alone and since 3 is being multiplied by x, we must divide both sides by 3.

7.666270253x10 raised to the 18th power

31 is prime. and it’s prime factorization is just 31.