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storerinc
Feb 8, 2010, 02:33 PM
3x+4y=-6 and 5x+3y=1
ROLCAM
Feb 8, 2010, 04:31 PM
3x+4y=-6
5x+3y=1

15x+20y = -30
15x+9y = 3

-15x-20y =30
15x+9y = 3

eliminate the xs.
-11y = 33
so y = - 3

5x+3y=1
5x-9 =1
5x = 1+9
5x = 10
x = 2