Question 361061
Let x = # liters of 2% brine to add.
{{{0.10*30 + 0.02x = 0.08*(30+x)}}},
{{{3+0.02x = 2.4 + 0.08x}}},
{{{0.6 = 0.06x}}},
{{{x = 0.6/0.06}}},
{{{x = 10}}}.