Question 994078
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Let *[tex \Large x] represent the number of notebooks and *[tex \Large y] represent the number of erasers.  Then


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x\ +\ y\ =\ 28]


and 


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 90x\ +\ 45y\ =\ 1800]


Solve the 2X2 system.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \