Question 644888
To find the original value on the gift card we will use the equation {{{x-6=14}}}
Before we do anything though, we will write a let statement, 
Let x= original value of the gift card

Next, we solve.
So add 6 to both sides (if you do something to one side, you must do it to the other) {{{x-6+6=14+6}}}

So you get {{{x=20}}}