Question

How do you simplify `2(42 – 3) – 7` using order of operations?

Answer 1

71

Explanation:

BIDMAS/PEMDAS

Do brackets first

`42-3 = 39`

Then Multiplication

`2*39 = 78`

then finally subtraction

`78-7=71`

Hopefully this helped

Answer 2

`71`

Explanation:

There are two terms. Simplify each to a single answer which can be added and subtracted in the last step.

In each term - do the brackets first and then the multiplication and division.

`color(blue)(2(42-3))" "color(green)(-" "7)`
`color(white)(xxx)darr`
`=color(blue)(2(39))" "color(green)(-" "7)`
`color(white)(.xx)darr`
`= color(blue)(78)" "color(green)(-" "7)`

`=71`