Question 1121518
Notice,  4, 5, 6, 7, 8, 9, 10

The asked-for 6% is  {{{2/3}}} of the way from 4 to 10.

{{{24/3=8}}};


16 ounces of the 4% and 8 ounces of the 10%.



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x, amount ounces of 4%
80-x, amount of 10%
{{{4x+10(24-x)=24*6}}}
-
{{{2x+5(24-x)=24*3}}}
{{{2x+120-5x=72}}}
{{{-3x=72-120}}}
{{{3x=120-72}}}
{{{x=40-24}}}
{{{x=16}}}