#numex19{
position:absolute;
left:5%;
top:47%;
z-index: 1;
}

#enonce_ex19{
position:absolute;
left:5%;
top:52%;
z-index: 1;
}

#evolutions{
float:left;
margin-left:22%;
width: 100%;
}

#tableur2{
float:left;
margin-left:12%;
}

#ex18_case1A{
position:absolute;
left: 165px;
top: 328px;
}

#ex18_case1B{
position:absolute;
left: 349px;
top: 328px;
}

#ex18_case2A{
position:absolute;
left: 165px;
top: 368px;
}

#ex18_case2B{
position:absolute;
left: 349px;
top: 368px;
}

#ex18_case3A{
position:absolute;
left: 165px;
top: 408px;
}

#ex18_case3B{
position:absolute;
left: 349px;
top: 408px;
}

#ex18_case4A{
position:absolute;
left: 165px;
top: 448px;
}

#ex18_case4B{
position:absolute;
left: 349px;
top: 448px;
}

#ex18_case5A{
position:absolute;
left: 165px;
top: 488px;
}

#ex18_case5B{
position:absolute;
left: 349px;
top: 488px;
}

#DV{
position:absolute;
left:120px;
top:323px;
width:300px;
background-color: #eee;
}