Question 42406
You can solve this problem by setting up an proportion. 12 over $5.80 should be equal to the number of patties we can purchase with $7.00 over $7.00. 
We will give the number of patties we can purchase with $7.00 a value of x.
12/5.80 = x/7   This is the proportion. Next we crosst-multiply.
12*7 = 5.80*x   We now have an equation.
84 = 5.80x      This is the simplified version.
14.48 = x       Divided by 5.80 to get x. 
It says that x equals 14.48 but you can't have part of a pattie left over so we can buy aprroximately 14 patties with money left over with $7.00.