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100x+22,5=45+10x
90x=22,5
x=0,25kg
4500g roztworu - x soli
100x=4,5*5
100x = 22,5 / :100
x= 225g
100g - 10g
4500g - x
100x=450g soli
450-225=225
Odp. nalezy dodac 225g soli.
4500g roztworu - x soli
100x=4,5*5
100x = 22,5 / :100
x= 225g
x= 2,5kg