Zdeněk 4090

Petr scored 18 points, Jirka half, Roman scored 3 points less than Petr, and Zdeněk one point less than Jirka. Find out how many points Zdeněk got.

Correct answer:

z =  8

Step-by-step explanation:


p = 18
2j-p = 0
p-r = 2
j-z = 1

j = 9
p = 18
r = 16
z = 8

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