Extinguishing 63834

40% of the foam was sprayed from the foam fire extinguisher during the fire extinguishing exercise. The weight of the entire device was 7 kg, and after training, it dropped to 4.6 kg. What was the weight of the empty device?

Correct answer:

m =  1 kg

Step-by-step explanation:

q=100%40%=110040=0.6  m+p=7 m+q p=4.6 m+p=7 m+0.6 p=4.6  m+p=7 m+0.6p=4.6  Row2Row1Row2 m+p=7 0.4p=2.4  p=0.42.4=6 m=7p=76=1=1 kg  m=1 p=6

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 are looking for calculator system of linear equations?

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

Related math problems and questions: