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stasiu 3010DLA JASIA
y-ilość żetonów Stasia
x+10=y-10
2(x-10)=y+10
x=y-20
2x-20=y+10
x=y-20
2x-y=30
x=y-20
2(y-20)-y=30
x=y-20
2y-40-y=30
x=y-20
y=70
x=70-20
y=70
x=50
y=70
Jasiu ma 50 żetonów, a Staś 70.