Subtracting a float

https://www.codecademy.com/courses/learn-intermediate-css/lessons/media-queries/exercises/breakpoints

@media only screen and (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {

  .page-title, 

  .page-description {

    float: left;

    width: 20em;

  }

how can I get the same results not using a float

thanks!