250g 6% ...................3-0=3.....................3%xg 0%....................... 6-3=3250/x = 3/33x = 250*3x = 250g wody
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250g 6% ...................3-0=3
.....................3%
xg 0%....................... 6-3=3
250/x = 3/3
3x = 250*3
x = 250g wody