giving 10 points to anyone who answers these
y=4x-6
y=-3x=8


2. y=2x
7x-6y=20


3. 4x-6y=-16
5x+y=-3

4. x+4y=2
-2x+3y=-15

5. -5x-2y=9
y=-3x-6

6. 4x+y=18
-2x7y=6