Question 814538
Use the information in the first sentence to account for cost.
{{{3.50x+4.30y=TheCost}}}
{{{(3.5x+4.3y)/10=4}}}
The second equation shown here is for the described PRICE for the candy mixture.  The 10 pound mixture is supposed to have a price of 4 dollars per pound.  See, COST of mixture divided by POUNDS of mixture is the price in dollars per pound.


You need one more equation so you can solve for both the values of x and y.
{{{x+y=10}}}, which accounts for the number of pounds of each of the differently priced candies.


You now just need to solve this system for x and y:
{{{(3.5x+4.3y)/10=4}}}
and
{{{x+y=10}}}