Children tickets

A ticket to the museum for children costs 10 SKK for adults and 20 SKK. Fifty people came to the museum and paid 700 SKK. How many children were there?

Correct answer:

x =  30

Step-by-step explanation:


x+y=50
10x+20y=700

x+y=50
10·x+20·y=700

x+y = 50
10x+20y = 700

Pivot: Row 1 ↔ Row 2
10x+20y = 700
x+y = 50

Row 2 - 1/10 · Row 1 → Row 2
10x+20y = 700
-y = -20


y = -20/-1 = 20
x = 700-20y/10 = 700-20 · 20/10 = 30

x = 30
y = 20

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 linear equation or system of equations and 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: