SOLUTION: In an alloy of silver and Nickel, mass of silver and nickel are 48 lbs and 72 lbs respectively. how much more silver should be added in the alloy so that the alloy will contain 46%

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: In an alloy of silver and Nickel, mass of silver and nickel are 48 lbs and 72 lbs respectively. how much more silver should be added in the alloy so that the alloy will contain 46%      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 807783: In an alloy of silver and Nickel, mass of silver and nickel are 48 lbs and 72 lbs respectively. how much more silver should be added in the alloy so that the alloy will contain 46% silver now ?
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = pounds of Silver to add.

48 pounds of Silver and 72 pounds of Nickel are already in the alloy. Wanted is 46% Silver.

%2848%2Bx%29%2F%2848%2B72%2Bx%29=46, the basic equation, specifically to use. If you understand how this equation is formed, GOOD!
'
Solve for x.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = mass of silver to be added
+%28+48+%2B+x+%29+%2F+%28+48+%2B+72+%29+=+.46+
+48+%2B+x+=+.46%2A120+
+x+=+55.2+-+48+
+x+=+7.2+
7.2 lbs of silver must be added
check:
+%28+48+%2B+7.2+%29+%2F+%28+48+%2B+72+%29+=+.46+
+55.2+%2F+120+=+.46+
+55.2+=+.46%2A120+
+55.2+=+55.2+
OK