# How do you solve 4x≤12 or -7x≥21?

Jul 22, 2015

$x \le 3$

#### Explanation:

$4 x \le 12$
$\Rightarrow x \le 3$

$- 7 x \ge 21$
$\Rightarrow x \le - 3$

All solutions for $- 7 x \ge 21$ are included in solutions for $4 x \le 12$

So only the restriction $x \le 3$ placed by $4 x \le 12$ is significant.