Call the weght of the first truck "\(w_{1}\)". We then know that the truck after that is 2 tons more, and the next and the next. i.e:
\(w_{2} = w_{1} + 2\)
\(w_{3} = (w_{2} + 2) = (w_{1}+4)\)
\(w_{4} = (w_{3} + 2) = (w_{1}+6)\)
We also know that total is 32 tons.
\(w_{total} = 32 = (w_{1}) + (w_{2}) + (w_{3}) + (w_{4})\)
\(32 = (w_{1})+(w_{1}+2)+(w_{1}+4)+(w_{1}+6)\)
\(32= 4(w_{1})+12\)
\(20=4(w_{1})\)
\(w_{1} = 5 tons\)
Therefore the trukcs weigh 5,7,9 and 11 tons for a total of 32 tons.
Converting to pounds, the trucks weigh 10,000, 14,0000, 18,0000 and 22,000 pounds.
