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0,02*30=0,6
0,03(30-x)
0,03=0,03(30-x)
0,03=0,9-0,03x | :0,03
1= 0,9-x |-0,9
0,1=x
0,1*100= 10 kg
Odparowano 10 kilogramów wody
b)x - ilosc solanki o 5% stezeniu;
x - 10 - ilosc solanki o 6% stezeniu;
5% * x - ilosc soli na poczatku;
6% * (x - 10) - ilosc soli w koncu;
sol pozostaje bez zmian, wiec 5% * x = 6% * (x - 10) 5% * x = 6% * x - 0.6;
6% = 6 / 100 0.6 = 6% * x - 5% * x 0.6 = x * (6% - 5%) 0.6 = x * 1% 0.6 = x * 1 / 100;
1% = 1 / 100 x = 0.6 * 100 x = 60 kg
PZDR;P
spr będę miałą z tego;d