y=2x-3,y=5x=2=0
(1)y=1-x 3x+2y=-1 ==>3X+2-2X=-1 X=-1 ,y=2
(2)5x-2y=1 x=7-3y ==>5(7-3y)-2y=1 y=2,x=1
(3)3x+y=1 2x+3y=-4 ==>2x+3-9x=-4 x=1 ,y=-2
(4)3x-5y=1 4-x=2y ==>12-6y-5y=1 y=1,x=2
y=2x-3,y=5x=2=0
(1)y=1-x 3x+2y=-1 ==>3X+2-2X=-1 X=-1 ,y=2
(2)5x-2y=1 x=7-3y ==>5(7-3y)-2y=1 y=2,x=1
(3)3x+y=1 2x+3y=-4 ==>2x+3-9x=-4 x=1 ,y=-2
(4)3x-5y=1 4-x=2y ==>12-6y-5y=1 y=1,x=2