[anijet]

Without trying to confuse the issue, keep in mind that if you support the front of the trailer at the pin, the weight on the axles will go up. So, when you are hitched up, the weight on the axles is more than what it weighed when the front was supported by the front jacks.

After you calculate the pin weight, you can subtract it from the total trailer weight to get hitched up axle weight.