So I tinted my outback also, and thanks to NC i had to remove the tint last month because of a failed inspection, so i pulled it off...inspected it and then put it right back on, dumb shit right?

So when you put 20% on the front driver/passenger, it'll read about 14% (+-1%) depending on what brand and type of tint you used. The back windows were already tinted from the factory so you put 20% tint on top of that, who knows what that reads, although the back should not matter...at least in my state it doesnt. They just dont allow you to tint the front pass./driver any darker than 35% and the windshield cant be changed (minus the top few inches)

I can actually see it in the pictures, your back windows are much darker than your front pass/driver, which is fine, it helps darken the entire inside of the car. To have a 20% all around, you would have had to only do the front windows since the backs were done.