One kilogram of cheaper coffee costs CZK 150, and one kilogram of more expensive coffee costs CZK 200. We have to prepare a mixture of 35 kg of coffee for 180 CZK. How do we prepare the mixture (how many of which kind of coffee do we need)?

Correct answer:

a =  14 kg
b =  21 kg

Step-by-step explanation:

150a+200b=180 35 a+b=35  150 a+200 b=180 35 a+b=35  150a+200b=6300 a+b=35  Row21501 Row1Row2 150a+200b=6300 0.33b=7  b=0.333333337=21 a=1506300200b=1506300200 21=14=14 kg  a=14 b=21

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

Tips for related online calculators
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:

Units of physical quantities:

Themes, topics:

Grade of the word problem:

Related math problems and questions: