Purchased 82340

The company secretary bought stamps worth CZK 20 and CZK 15. The total number of purchased stamps is 120, and the secretary paid a total of 2265 CZK. How many stamps worth 15 CZK did she buy?

Correct answer:

b =  27

Step-by-step explanation:

a+b=120 20a+15b=2265  20(120b)+15b=2265  20 (120b)+15 b=2265  5b=135  b=5135=27  b=27   Verifying Solution:  a=120b=12027=93

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

Tips for related online calculators
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?

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

Related math problems and questions: