Question 103235
(1)5x-2y=-5
(2)y-5x=3
(3)y=5x+3

Substituting (3) to (1),

5x+2(5x+3)=-5
5x+10x+6=-5
15x+6=-5
15x=-11
x=-11/15

y=5(-11/15)+3
 =-2/3

The solution set, (x,y)=(-11/15,-2/3)



(1)8x-4y=16
(2)y=2x-4

Substituting (2) to (1),
8x-4(2x-4)=16
8x-8x+16=16
16=16

Therefore, the statement has infinite solutions!