Question 627112
Let x = number of liters of the 10% solution needed
{{{(8(0.04) + 0.1x)/(x + 8) = 0.06}}}
{{{0.32 + 0.1x = 0.06x + 0.48}}}
{{{ 0.04x =   0.16}}}
{{{x = 4}}}
Answer: {{{highlight(4 liters)}}}