Respuesta :

Use PEMDAS
Parenthesis
Exponents
Multiply & division (depending on which is first)
Addition and subtraction
Hope this kind of helps :)
You would solve this problem by Order of Operations.
Order of operations:
Parenthesis 
Exponents
Multiplication
Division
Addition
Subtraction
YOU MUST FOLLOW THOSE IN ORDER.
HOPE THIS HELPS YOU! ^_^