It helps…
Try with this CSS:
.entry-content {
margin: 0 15px;
}
Inches are not a valid measurement unit in electronic publishing, you have to switch to pixels, points or even better to percentage 🙂
Also, be aware that since you put the google map code inside paragraph wrap you will have to adjust the width of the map, or even better wrap the map code inside some div and mark it with ID and then style it with css…:
Inside post:
<div id="mymap">
here goes google map code
</div>
CSS:
#mymap {
margin: 0 0 0 -25px;
}