Answer:
13.5
Explanation:
You use PEDMAS - priority of calculation
1) Paranthesis
2) Exponents
3) Divide or Multiple (whichever comes first, reading left to right)
4) Add or Subtract (whichever comes first, reading left to right)
so,
Parenthesis first:
becomes
No exponents, so we skip this step
Left to right for multiply or divide: first comes multiply.
becomes
Now, last one is divide: