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

1 Answer
Richard G. · Stefan V.
Apr 19, 2016

-1

Explanation:

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#

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