The water barrel

The water barrel weighs 122 kg. If we pour 75% of the water out of it, it will weigh 35 kg. What is the weight of the barrel?

Correct answer:

s =  6 kg

Step-by-step explanation:


s+v=122
s + v -0.75 v = 35

s+v=122
s + v -0.75·v = 35

s+v = 122
s+0.25v = 35

Row 2 - Row 1 → Row 2
s+v = 122
-0.75v = -87


v = -87/-0.75 = 116
s = 122-v = 122-116 = 6

s = 6
v = 116

Our linear equations calculator calculates it.



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
Do you have a system of equations and looking for calculator system of linear equations?
Tip: Our volume units converter will help you convert volume units.

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: