How much #90%# saline solution should we mix to #3qt.# of #15%# saline mix to make #45%# saline solution?
We can then express the problem mathematically as:
Then, let's substitute the first mathematical expression in place of
Therefore, we need to mix
Let us assume that we need to mix
It is mixed with
and on mixing the two, the total quantum of saline is
Hence, we need