Posted by **Robin** on Sunday, April 11, 2010 at 5:31pm.

substitution method

7x +9y= 19

x=25-5y

I read over all the problems I do not see any errors I can find.

Please point this out!

After this I have another problem

0.1<-4

0.1 X 100 < -4

10< -4

10 -4

_______

10 10

{x|< - 4/10 or -0.4

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