SOLUTION: how many pounds of an alloy of 20% silver must be melted with 50lbs of an alloy with 30% silver in order to get an alloy of 27% silver
Algebra.Com
Question 215321: how many pounds of an alloy of 20% silver must be melted with 50lbs of an alloy with 30% silver in order to get an alloy of 27% silver
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
.20x+.30*50=.27(50+x)
.20x+15=13.5+.27x
.20x-.27x=13.5-15
-.07x=-1.5
x=-1.5/-.07
x=21.43 pounds of 20% silver is used.
Proof:
.20*21.43+.30*50=.27(50+21.43)
4.286+15=.27*71.43
19.286=19.286
RELATED QUESTIONS
How many pounds of an alloy of 25% silver must be melted with 60 lb of an alloy with 40%... (answered by ikleyn)
How many pounds of an alloy containing 32% silver must be melted with 25 pounds of an... (answered by ptaylor)
How many pounds of an alloy containing 45% silver must be melted with a alloy containing... (answered by ikleyn)
How many pounds is an alloy containing 20% of silver must be melted with 30 pounds of an... (answered by lwsshak3)
how many ounces of a 35% silver alloy must be melted with an alloy of 65% silver to... (answered by scott8148)
How many pounds of a certain alloy containing 35% silver must be melted with another... (answered by mananth)
How many grams of an alloy that is 70% silver should be melted with 60 grams of an alloy... (answered by checkley77)
What weight of an alloy containing 10% silver must be melted with an alloy containing 60% (answered by stanbon)
What weight of an alloy containing 10% silver must be melted with an alloy containing 60% (answered by josmiceli)