Posted by **Janna** on Wednesday, August 8, 2007 at 1:38am.

Not sure about this...

Need to solve by substitution

8x - 4y = 16

y = 2x -4

Substitute 2x -4 for y in the first equation and solve the resulting equation for x.

8x - 4(2x-4) = 16

16 = 16

The two equations are not independent. One can be derived fron the other. There are an infinite number of solutions