Children tickets

A children's ticket to the museum costs 10 SKK and an adult ticket costs 20 SKK. Fifty people visited the museum and paid 700 SKK in total. How many of them were children?

Final 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.



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