A unit rate means a rate for one of something. We write this as a ratio with a denominator of one. For example, if you ran 70 yards in 10 seconds, you ran on average 7 yards in 1 second.
First, you want to get x by itself on one side. We write the equation as . Since 14 is being subtracted from , we add it to both sides to cancel it out, or .
. Since 14 is being subtracted from 
, we add it to both sides to cancel it out, 
or 
.