Friday, May 10, 2013

Use the elimination method to solve the system.











Solution:



 %0D%0A7x%2B5y%2B12=0%0D%0A 

becomes 
%0D%0A%283y-4%29%2B5y%2B12=0%0D%0A 

8y%2B8=0 
which means y=-1 

and so... 
7x=3y-4=3%28-1%29-4=-7 

and thus x=-1 

solution: (-1,-1)
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