x - Jacek
y - Paweł
x + y = 350
x - y = 30
x = 350 - y
350 - y - y = 30
2y = 320
y = 160
x = 190
x- ilosc znaczków jacka
y- ilosc znaczków pawła
x+y=350 <-------- to ma byc w klamrze
x=30+y
30+y+y=350
30+2y=350
2y=320/2
y=160
x+160=350
x=190
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x - Jacek
y - Paweł
x + y = 350
x - y = 30
x = 350 - y
350 - y - y = 30
x = 350 - y
2y = 320
y = 160
x = 190
x- ilosc znaczków jacka
y- ilosc znaczków pawła
x+y=350 <-------- to ma byc w klamrze
x=30+y
30+y+y=350
30+2y=350
2y=320/2
y=160
x+160=350
x=190