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16-11-2017
Mathematics

contestada

Given: -7x < -21.

Choose the solution set.
A. {x | x < -3}
B. {x | x > -3}
C. {x | x < 3}
D. {x | x > 3}

Respuesta :

16-11-2017

[tex] - 7x < - 21[/tex]
Divide both sides by - 7. Switch the direction of the inequality when dividing by a negative number.
[tex]x > 3[/tex]
The answer is D.

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