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x-100%
x=32g*100%/80%=40g
x-100%
32*100/80=3200/80=320/8=40g
Odp. Brozka wazy 40g.
znak / to kreska ulamkowa jak cos :)
x-masa brożki;
0,8x=32[g];
x=32/0,8;
x=40[g]
Odp.Brożka waży 40[g].