# At a Christmas Eve charity fundraiser, the price of 4 mince pies and 2 sausage.........How much do 3 sausage rolls cost?

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At a Christmas Eve charity fundraiser, the price of 4 mince pies and 2 sausage rolls is \$ 7.38, while the price o 3 mince pies and 7 sausage rools is \$ 10.43.
How much do 3 sausage rolls cost?

posted Nov 15, 2018

\$2.67

mince pies=m
sausage rolls=s
4m+2s=7.38 => 2m+s=3.69 --------> (1)
3m+7s=10.43 --------> (2)
(2)*2-(1)*3=6m+14s - 6m-3s=11s=20.86-11.07=9.79 => 11s=9.79
3s=9.79*3/11=2.67

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