Problema Solution
A certain bronze alloy containing 4% tin is to be added to 351 pounds of bronze containing 18% tin to produce a new bronze containing 15% tin. How many pounds of the 4% bronze is required.
Answer provided by our tutors
let
x = the pounds of the 4%
y = 351 lb of the 18%
x + y = the new bronze weight
4% of x + 18% of y = 15% of (x + y)
0.04*x + 0.18*351 = 0.15*(x + 351)
by solving the equation we find
x = 95.72 lb
95.72 lb of the 4% bronze is required.