Question

if there are four trucks parked in line and after the first truck each truck weighed 2 more tons than the one before. They all weighed 32 tons together.How many pounds does each truck weigh

Answer 1

Each truck weighs five tons. 

1st truck: n 
2nd truck: n + 2
3rd truck: n + 4
4th truck: n + 6 

n + n + 2 + n + 4 + n + 6 = 32 
4n + 12 = 32 
      - 12   - 12
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4n = 20 
----  ------
 4      4

n = 5