Question 758337
Copper price = m dollars per pound
Tin price = m+2 dollars per pound


Mix 2 pounds of tin with 8 pounds of copper:
Account for cost, {{{2*(m+2)+8*m}}}
and {{{highlight((2(m+2)+8m)/(2+8)=4.15)}}} to account for price.


Solving for m will give the price for the copper, per pound.
Add 2 and this is the price for the tin.