Question 85077
Set up the following system of equations

{{{5.5x+3y=20*3.50}}}
{{{x+y=20}}}


Multiply


{{{5.5x+3y=70}}}
{{{x+y=20}}}



Multiply the first equation by 10 to remove the decimal

{{{55x+30y=700}}}
{{{x+y=20}}}


*[invoke solving_linear_system_by_elimination 55, 30, 700, 1, 1, 20]


so you need 4 pounds of cashews and 16 pounds of pecans to make a 20 pound mix costing $3.50 per pound.