Question 98428
30*4=2.5x+5*(30-x)
120=2.5x+150-5x
120-150=2.5x-5x
-2.5x=-30
x=-30/2.5
12 pounds of $2.50 peanuts are needed.
30-12=18 pounds of $5.00 cashews are needed.
proof
30*4=2.5*12+5*18
120=30+90
120=120