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zegar- x
rownanie
x+x-5=5,5
2x-5=5,5 /+5
2x=10,5 /:2
x=5,25
5,25-5=0,25
odp:zegar wazy 5,25kg a kukulka 0,25kg
x-zegar
z-5-kukolka
x+x-5=5,5
2x=10,5\:2
x=5,25
5,50-5,25=0,25
zegar wazy 5,25kg ,a kukolka 0,25kg