# What is #[7+(10-:5-9)]-9#?

##### 1 Answer

Mar 4, 2018

#### Explanation:

We can use PEMDAS:

#color(red)(P)# - Parentheses (also known as Brackets)#color(blue)(E)# - Exponents#color(green)(M)# - Multiplication#color(green)(D)# - Division (this has the same weight as M and so I gave it the same colour)#color(brown)(A)# - Addition#color(brown)(S)# - Subtraction - (again, same weight as A and so the same colour)

We first look for

Inside this bracket is another one:

We have two operations here - division and subtraction. See that

Since we now know that

What we have left is addition and subtraction, and so we work from left to right: