Question 1112722
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Let *[tex \Large x] represent the number of students that fit in a van and let *[tex \Large y] represent the number of students that fit on a bus.  A had 12 vans, so *[tex \Large 12x] students rode in vans, and 7 busses, so *[tex \Large 7y] students rode in busses.  Therefore, since there were 485 students from A:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 12x\ +\ 7y\ =\ 485]


Similarly for B:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x\ +\ y\ =\ 65]


Solve the system by any convenient means. Either substitution or elimination will work nicely.  Gauss-Jordan would probably be overkill, but a good exercise to prepare for more difficult problems.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

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