3. Solve for x.
4.
E
7x + 2
18
How do I solve

Let's solve and find out.

3x - 2y = 4
-6x + 4y = -8

To solve by elimination, multiply the top equation by 2 to cancel out y-terms.

2(3x - 2y = 4)
6x - 4y = 8

Now, add the equations together.

     6x - 4y = 8
   -6x + 4y = -8
+
     0  -  0  =  0

Since we get that 0 = 0, this system has infinitely many solutions. Only graphs that represent the same line have infinitely many solutions, so...

D) There are infinitely many solutions because the equations represent the same line