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2x=1+1,5x
2x-1,5x=1
0,5x=1/:0,5
x=2
2x = 1,5x + 1
2x - 1,5x = 1
0,5x = 1
5x = 10
x = 2kg
1 cegła - 1,25kg
1,5 cegły - 1,50kg
2 cegły - 1, 75 kg