Question 399321
Let {{{x}}} = pounds of other ingredients to add
Oats in 1000 pounds = {{{.9*1000 = 900}}}
{{{900/(1000 + x) = .8}}}
{{{900 = .8*(1000 + x)}}}
{{{900 = 800 + .8x}}}
{{{.8x = 100}}}
{{{x = 125}}}
125 pounds of other ingredients must be added