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x = 1 + 0,5x
x - 0,5x =1
0,5x = 1
x = 2
spr.:
2 = 1 + 0,5*2,
2 = 1+1
2 = 2
Cegła waży 2 kg.
1kg = x - 0,5x
1 kg = 0,5x / *2
2 kg = x
x = 2kg
Myślę że dobrze ;)