SOLUTION: Galvanizeds nails are sold by the pound. Robert bought 2$ worth of 6 penny nails and 3$ of 8 penny nails for a total weight of 8 pounds. later he bought 1$ worth of 6 penny nails

Question 108066: Galvanizeds nails are sold by the pound. Robert bought 2$ worth of 6 penny nails and 3$ of 8 penny nails for a total weight of 8 pounds. later he bought 1$
worth of 6 penny nails and 6$ worth of 8 penny nails for a total weight of 10 pounds. How muchper pound does each nail cost?
I did for the first equation 2/x+ 3/y=8 and the second equation I did 1/x + 6/y=10. So the equation wound be total cost/price per pound and I can't get why I'm wrong.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
your equations look ok

multiplying the first equation by 2 and subtracting the second equation gives 3/x=6, so x=1/2

2/(1/2)+3/y=8 ...3/y=4 ... y=3/4
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