-7x>21

Divide each term in -7x>21 by -7. When multiplying or dividing both sides of an inequality by a negative value, flip the direction of the inequality sign.

-7x-7<21-7

Cancel the common factor.

-7x-7<21-7

Divide x by 1.

x<21-7

x<21-7

Divide 21 by -7.

x<-3

The result can be shown in multiple forms.

Inequality Form:

x<-3

Interval Notation:

(-∞,-3)

Solve for x -7x>21