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find all real number x such that 
6x-21≥3 or 14x+11≤-7

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Ryan2id
[tex]6x-21 \geq 3\\ \\ 6x \geq 3+21\\ \\ 6x \geq 24\\ \\ x \geq \frac{24}{6}\\ \\ \boxed{x \geq 4}[/tex]

[tex]14x+11 \leq -7\\ \\ 14x \leq -7-11\\ \\ 14x \leq -18\\ \\ x \leq \frac{19}{14}\\ \\ x \leq \frac{9}{7}[/tex]