Problem in Media Quarry

.left img{
    width: 200px;
    padding-top: 120px;
    padding-bottom: 10px;
}


and this is my media 
 @media only screen and (max-width: 600px) {
          .left img{
        width: 100px;
       
    }

.left img{
    width: 200px;
    padding-top: 120px;
    padding-bottom: 10px;
}


and this is my media 
 @media only screen and (max-width: 600px) {
          .left img{
        width: 100px;
       
    }