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2x=17+³/₄x-waga dwoch cegiel
74x=37*2x-waga 74 cegiel
74x=37*(17+³/₄x)
74x=629+27.75x
74x-27.75x=629
46.25x=629
x=13,6kg-waga jednej cegly
13.6*74=1006.4kg
odp 74 cegly waza 1006.4kg
2x = 17 kg + 0,75 x
1,25 x = 17 kg
x = 13,6 kg
74x = 1006,4 kg