Question 123564
Let {{{w}}} = amount of water to be added
In words:
salt / (original solution + added water) = 20%
{{{.32*300 = 96}}}l of salt
{{{96 / (300 + w) = .2}}}
{{{96 = .2(300 + w)}}}
{{{96 = 60 + .2w}}}
{{{.2w = 36}}}
{{{w = 180}}}l of water need to be added
check:
{{{96 / (300 + w) = .2}}}
{{{96 / (300 + 180) = .2}}}
{{{96 / 480 = .2}}}
{{{.2 = .2}}}
OK