Tìm số tự nhiên x sao cho: <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-1"><span class="MJXp-mstyle" id="MJXp-Span-2"><span class="MJXp-mi MJXp-italic" id="MJXp-Span-3">x</span></span></span></span><script type="math/tex" id="MathJax-Element-1">\Large x</script> = 2 <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-4"><span class="MJXp-mstyle" id="MJXp-Span-5"><span class="MJXp-mi MJXp-italic" id="MJXp-Span-6">x</span></span></span></span><script type="math/tex" id="MathJax-Element-2">\Large x</script> = 3 \(\Large