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mihalych1998 [28]

2 years ago

8

an alloy of tin is 15% tin weigh 20 pounds . A second alloy is 10% tin . how much pounds of the second alloy must be added to th

e first to get a 12% mixture

1 answer:

Ulleksa [173]2 years ago

7 0

12%=(3+10%*x)/(20+x)
x=30

add 30 pounds of the second alloy

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