Question
Given $x \in$ {whole numbers}, find the solution set of $: -1 ≤ 3 + 4x < 23$
✓
Answer
$-1 \leq 3+4 x<23 $
$\Rightarrow-1 \leq 3=4 x \text { and } 3+4 x<23 $
$ \Rightarrow-4 \leq 4 x \text { and } 4 x<20 $
$ \Rightarrow x \geq-1 \text { and } x<5$
Sin cex $\in\{$ Whole number $\}$
$\therefore$ Solution set $=\{0,1,2,3,4\}$
$\Rightarrow-1 \leq 3=4 x \text { and } 3+4 x<23 $
$ \Rightarrow-4 \leq 4 x \text { and } 4 x<20 $
$ \Rightarrow x \geq-1 \text { and } x<5$
Sin cex $\in\{$ Whole number $\}$
$\therefore$ Solution set $=\{0,1,2,3,4\}$
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