SOLUTION: how many punds of an alloy containing 60% silver must be added to 50 pounds of an alloy containing 45% silver to obtain an alloy containing 51% silver?

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Question 170152: how many punds of an alloy containing 60% silver must be added to 50 pounds of an alloy containing 45% silver to obtain an alloy containing 51% silver?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
lets call the pounds needed for 60% alloy x.
:
.6x+.45(50)=.51(x+50)
:
.6x+22.5=25.5+.51x
:
.09x=3
:
highlight%28x=33.33%29pounds needed for 60% alloy