You've been given some good advice. However, weighing individual corners ONLY applies to TRYING to evenly load your vehicle. Weighing each axle, and using the tire manufacturers chart for your particular brand and model of tire, will determine the pressures for the tires.
You most likely will get different weights of all four corners but, you cannot run four different tire pressures. Truck scales normally are calibrated very often due to strict DOT standards. They don't want our roads torn up any sooner than they are. So, they're pretty heads up on if a truck is overloaded or not when, truckers are trying to get the max on their rigs to get max money per load. So, the scales are pretty darned accurate.
The Dinghy Towing Guide for our last toad, an '11 HONDA CRV, EX-L stated it weighs 3200# but, on a certified truck scale, it came in right at, 3700. That same Dinghy Towing Guide, said our present toad, an '11 GMC Sierra 1500 Extended Cab 4x4, says it weighs, 4875#, well, again, at a certified scale, it's tipping 5300 lbs. So, just some info here.
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)