Question 217466
4x+2.25(70-x)=3*70
4x+157.5-2.25x=210
4x-2.25=210-157.5
1.75x=52.5
x=52.5/1.75
x=30 pounds of cashews is used.
70-30=40 pounds of peanuts is used.
Proof:
4*30+2.25*40=210
120+90=210=210