Answer:
5x+3y+(-x)+6z
5x+(-x)+3y+6z
4x+3y+6z
The facts to apply is PEMDAS which is parenthesis,exponents, multiplication,division,addition and subtraction.
Then group like terms if there are any.
You finally get to a simplified answer if there are no like terms
Doubling every 3 years, meaning 200% every 3 years.


The answer is 24 years.
Hope this helps. - M
Mean=10.7
median=8
hope this helps