One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be comb

Question

IRISSAK [1]

3 years ago

14

One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be comb

ined to produce a 30 pound alloy that is 1 part iron to 1 part silver?

Mathematics

1 answer:

Shalnov [3] · Answer 1 · 2021-12-01T14:14:20+03:00

Shalnov [3]3 years ago

8 0

Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!