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January 28, 2015

January 28, 2015

Posted by **Tory Smith** on Saturday, January 15, 2011 at 3:55pm.

- Math -
**helper**, Saturday, January 15, 2011 at 5:50pmx = number of graph notebooks

y = number of college ruled notebooks

2.64x = total value sold graph notebooks

3.61y = total value sold college notebooks

x + y = 50

2.64x + 3.61y = 168.86

Solve these 2 equations together by elimination or substitution method

I will use substitution method

x + y = 50

x = 50 - y

2.64x + 3.61y = 168.86

2.64(50 - y) + 3.61y = 168.86

132 - 2.64y + 3.61y = 168.86

132 + .97y = 168.86

.97y = 36.86

y = 38

substitute y = 38 in x + y = 50, to find x

x + 38 = 50

x = 12

12 graph notebooks were sold

38 college ruled notebooks were sold

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