Question 1156046
x pounds of the $0.99 per pound sunflower seeds
40-x pounds of $0.69 per pound birdseeds


{{{0.99x+0.69(40-x)=0.92*40}}}
-

{{{0.99x-0.69x+0.69*40=0.92*40}}}

{{{(0.99-0.69)x=0.92*40-0.69*40}}}

{{{x=(0.92*40-0.69*40)/(0.99-0.69)}}}

{{{highlight(x=40((0.92-0.69)/(0.99-0.69)))}}}------continue from here...