26-02-2020
Mathematics

contestada

Solve each question mentally
-3x = 21

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myakponce95 myakponce95

26-02-2020

x = -7

3 • 7 = 21

-3 • (-7) = 21

If you multiply two negative numbers you’ll end up with a positive. Thus, - 3 (-7) = 21.

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