Answer:

Step-by-step explanation:
Let l litre of 7 grams of salt per litre is combined with x litres of water which contains y grams of salt per litre to yield a solution with 2 grams of salt per litre.
Thus,
Salt in l litre + salt in x litre = salt in resultant mixture
7l + xy = 2(l +x)
7l + xy = 2l + 2x
7l - 2l = 2x - xy
5l = x(2-y)

Hence,
litres of 7 gram of salt per litre is mixed.
Answer:3040
Step-by-step explanation:16000/100=160x19=3040
Answer:
12600 g
Step-by-step explanation:
a kilogram is a thousand grams
(don't forget to include units)