&lt;p class=&quot;MsoNormal&quot; style=&quot;color: rgb(113, 116, 141); line-height: normal;&quot;&gt;&lt;span style=&quot;font-weight: bolder;&quot;&gt;&lt;i&gt;&lt;u&gt;&lt;span style=&quot;font-size: 14pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(227, 108, 10);&quot;&gt;Exemple 2&amp;nbsp;:&lt;/span&gt;&lt;/u&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoListParagraph&quot; style=&quot;color: rgb(113, 116, 141); text-indent: -18pt; line-height: normal;&quot;&gt;&lt;span style=&quot;font-weight: bolder;&quot;&gt;&lt;i&gt;&lt;span style=&quot;font-size: 18pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(255, 0, 102);&quot;&gt;1.&lt;span style=&quot;font-style: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: &amp;quot;Times New Roman&amp;quot;;&quot;&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;/i&gt;&lt;/span&gt;&lt;span style=&quot;font-weight: bolder;&quot;&gt;&lt;i&gt;&lt;u&gt;&lt;span style=&quot;font-size: 18pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(255, 0, 102);&quot;&gt;III. R&eacute;soudre un probl&egrave;me &agrave; l&rsquo;aide d&rsquo;une &eacute;quation&amp;nbsp;:&lt;o:p&gt;&lt;/o:p&gt;&lt;/span&gt;&lt;/u&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;color: rgb(113, 116, 141); line-height: normal;&quot;&gt;&lt;span style=&quot;font-weight: bolder;&quot;&gt;&lt;i&gt;&lt;u&gt;&lt;span style=&quot;font-size: 16pt; line-height: 24.5333px; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 176, 80);&quot;&gt;Enonc&eacute;&amp;nbsp;&amp;nbsp;&lt;/span&gt;&lt;/u&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin-left: 18pt; color: rgb(113, 116, 141); line-height: normal;&quot;&gt;&lt;span style=&quot;font-weight: bolder;&quot;&gt;&lt;i&gt;&lt;u&gt;&lt;span style=&quot;font-size: 16pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 176, 80);&quot;&gt;M&eacute;thode :&lt;/span&gt;&lt;/u&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin-left: 18pt; color: rgb(113, 116, 141); line-height: normal;&quot;&gt;&lt;span style=&quot;font-weight: bolder;&quot;&gt;&lt;i&gt;&lt;u&gt;&lt;span style=&quot;font-size: 16pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 176, 80);&quot;&gt;&lt;o:p&gt;&lt;/o:p&gt;&lt;/span&gt;&lt;/u&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoListParagraph&quot; style=&quot;color: rgb(113, 116, 141); text-indent: -18pt; line-height: normal;&quot;&gt;&lt;span style=&quot;font-size: 14pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;1.&lt;span style=&quot;font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: &amp;quot;Times New Roman&amp;quot;;&quot;&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span dir=&quot;LTR&quot;&gt;&lt;/span&gt;&lt;span style=&quot;font-size: 14pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;Choix de l&rsquo;inconnue&amp;nbsp;:&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoListParagraph&quot; style=&quot;color: rgb(113, 116, 141); text-indent: -18pt; line-height: normal;&quot;&gt;&lt;span dir=&quot;LTR&quot; style=&quot;text-indent: -18pt;&quot;&gt;&lt;/span&gt;&lt;span style=&quot;text-indent: -18pt; font-size: 14pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;Mise en &eacute;quation&amp;nbsp;:&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoListParagraph&quot; style=&quot;color: rgb(113, 116, 141); text-indent: -18pt; line-height: normal;&quot;&gt;&lt;span style=&quot;font-size: 14pt; line-height: 21.4667px; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;R&eacute;solution de l&rsquo;&eacute;quation&amp;nbsp;:&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoListParagraph&quot; style=&quot;color: rgb(113, 116, 141); text-indent: -18pt; line-height: normal;&quot;&gt;&lt;span style=&quot;font-size: 14pt; line-height: 21.4667px; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class=&quot;MsoListParagraph&quot; align=&quot;center&quot; style=&quot;margin-bottom: 20px; color: rgb(113, 116, 141); text-align: center; text-indent: -18pt; line-height: normal;&quot;&gt;&lt;span style=&quot;font-size: 14pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;&lt;span style=&quot;font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: &amp;quot;Times New Roman&amp;quot;;&quot;&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span dir=&quot;LTR&quot;&gt;&lt;/span&gt;&lt;span style=&quot;font-size: 14pt; font-family: &amp;quot;Times New Roman&amp;quot;, serif; color: rgb(0, 32, 96);&quot;&gt;V&eacute;rification et retour &agrave; la situation&amp;nbsp;:&lt;/span&gt;&lt;/p&gt;