Question 72832
30*7+4X=5(X+30)
210+4X=5X+150
4X-5X=150-210
-X=-60
X=60 GRAMS OF GOLD ALLOY NEEDED TO PRODUCE THE REQUIRED $5 ALLOY.
PROOF
30*7+4*60=5(60+30)
210+240=5(90)
450=450