Ayuda porfavor???????​

<div class="athena_tag_tk_ques_text_content" data-testid="answer_box_text"><p><strong>Respuesta:</strong></p><p>Ahi ta :) </p><p><strong>Explicación paso a paso:</strong></p><p><strong>a</strong><strong>)</strong> x - 11 = 9</p><p><strong>b</strong><strong>)</strong><strong> </strong>x + 8 = 20</p><p><strong>c</strong><strong>)</strong><strong> </strong>3x = 27</p><p><strong>d</strong><strong>)</strong><strong> </strong>x/2 = 50</p></div>