Question 62496
a = gasohol 10% alcohol
b = gasohol 35% alcohol
{{{.1a + .35b = .25*400}}}
{{{a + b = 400}}}
multiply 2nd equation by .1
{{{.1a + .1b = 40}}}
subtract 2nd from 1st
{{{.25b = 60}}}
{{{b = 240}}}
{{{a + b = 400}}}
{{{a + 240 = 400}}}
{{{a = 160}}}
240 gal of the .1 mixture and
160 gal of the .35 misture