How do you simplify $-7(5/7 - 12/21)$ ?

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Answer 1 · 2016-04-19T02:44:05

-1

Order of Operations rules require the contents of the brackets to be done first

$12/21$ reduces to $4/7$ when you divide top and bottom by 3

Subtracting $4/7$ from $5/7$ leaves $1/7$

There is no math operational sign between the bracket and the -7 so it is multiplied.

$-7 xx 1/7 = -1$

How do you simplify -7(5/7 - 12/21)-7(5/7 - 12/21)?