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Solve each question mentally -3x = 21

Solve each question mentally -3x = 21
asked 22.0k views
1 vote
Solve each question mentally
-3x = 21

asked
User Nishant Shrivastava
by
8.8k points

1 Answer

4 votes
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.
answered
User Pankaj Suryawanshi
by
8.1k points
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