<span style="border:1px solid black">These two boxes should be the same width.</span><br>
<span style="border:1px solid black">These two boxes should be the same width.  


<img style="top:50px;position:absolute;width:100px;height:100px;background-color:green">


<img style="top:150px;position:absolute;width:100px;height:100px;background-color:green">


<img style="top:250px;position:absolute;width:100px;height:100px;background-color:green"><img style="top:350px;position:absolute;width:100px;height:100px;background-color:green">


</span>