JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<tr>
  <td>Carne bovina de corte</td>
  <td>
    <div>
      <input class="checkbox1" name="check[]" id="c1" value="Carne   bovina  de corte" type="checkbox"><span></span></div>
  </td>
</tr>
<tr>
  <td id="2" class="definicaoIndPesquisa">
    <h7 id="teste">Indicador para testes</h7>
    <br>
    <h5>Equaçao : Custo Operacional Efetivo*Custos Fixos</h5>
    <br>
  </td>
</tr>

JavaScript

$( "#c1" ).on( "click", function() {
		  $( "#teste" ).toggle();    
});