values of the variable that cause the polynomial to evaluate to zero.
C= the price of a cheeseburger and l = the price of a lemonade:

Divide the second equation by -2 to begin the process of solving by elimination:

Now that we have c, 4, we can plug it in to one of the equations to find l:

So, each cheeseburger is $4 and each lemonade is $1. The final answer is:
1 cheeseburger and 2 cups of lemonade would cost $6.
Multiply 8 3/4 lb by the conversion factor 16 oz
------------
1 lb
Then 35 lb 16 oz 560 oz
-------- * ----------- = ------------- = 140 oz (answer)
4 1 lb 4
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