SOLUTION: I don't really understand how to solve this type of problems Q:In a boat 25 persons were sitting. Their average weight increased one kilogram when one man goes and a new man comes

Question 737357: I don't really understand how to solve this type of problems
Q:In a boat 25 persons were sitting. Their average weight increased one kilogram when one man goes and a new man comes in. The weight of the new man is 70 kgs. Find the weight of the man who is going.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
:In a boat 25 persons were sitting.
Their average weight increased one kilogram when one man goes and a new man comes in.
The weight of the new man is 70 kgs. Find the weight of the man who is going.
:
let x = average weight of the 25 people and the weight of the guy that left
:
1 guy is replaced by 70 kg guy
= x + 1
24x + 70 = 25(x+1)
24x + 70 = 25x + 25
70 - 25 = 25x - 24x
45 = x
:
The guy that left weighed 45 kg
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