x - początkowa waga
3% z x = 2,1kg
3/100 *x = 2,1
3x /100 = 2,1
3x = 210
x = 70kg
Odp: 70-2,1 = 67,9kg
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3%=0,03
x=2,1:0,03
x=70
70-2,1=67,9kg
x - początkowa waga
3% z x = 2,1kg
3/100 *x = 2,1
3x /100 = 2,1
3x = 210
x = 70kg
Odp: 70-2,1 = 67,9kg