Semi-skimmed 17403

Mrs. Cermak paid 130 CZK for five boxes of semi-skimmed milk and ten rolls. A box of milk is 17 more expensive than a croissant. Calculate the price of a) 1 box of milk, b) 1 roll.

Correct answer:

m =  20
r =  3

Step-by-step explanation:


5m+10r = 130
m= 17+r

5·m+10·r = 130
m= 17+r

5m+10r = 130
m-r = 17

Row 2 - 1/5 · Row 1 → Row 2
5m+10r = 130
-3r = -9


r = -9/-3 = 3
m = 130-10r/5 = 130-10 · 3/5 = 20

m = 20
r = 3

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
Do you have a system of equations and looking for calculator system of linear equations?

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

Units of physical quantities:

Grade of the word problem:

Related math problems and questions: