What is happening
You arrive at a ferry loading ramp rated by axle weight.
The ramp is loaded past its certificate. It is rated to exactly 68 tonnes, each vehicle puts 4 tonnes on it, and the vehicle count is wrong.
Linear equationsRunning
Total load
147.2t
Ramp rating
68t
Coordinate navigator. Vehicles on the ramp at 36.8 . Total load 147.2 t, Ramp rating 68 t. Currently total load is over by 79.2 t.
What has to balance