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

2 Answers
Mar 19, 2018

71

Explanation:

BIDMAS/PEMDAS

Do brackets first

42-3 = 39

Then Multiplication

2*39 = 78

then finally subtraction

78-7=71

Hopefully this helped

Mar 19, 2018

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