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x+5-zegar
x+x+5=5.5
2x=5.5-5
2x=0.5
x=0.25
0.25+5=5.25
x+5- waga zegara
x+x+5=5.5
2x=5.5-5
2x=0.5
x=0.25
waga zegara:0.25+5=5.25
waga kukułki:5.5- 5.25=0.25