{5x=4-2y {4x+y=3 {6x-3y=9 {x+5y=-9,5

1)5x+2y=4 4x+y=3 5x+2y=4 -8x-2y=-6 3x=-2 x=2/3

{5x=4-2y {4x+y=3 {5x+2y=4 {4x+y=3 /*(-2) {5x+2y=4 {-8x-2y=-6 -3x=-2 /: (-3) X=2/3 Y=3- (4*2/3) Y=3 -2 i2/3 Y=1/3 {6x-3y=9 {x+5y=-9,5 /* (-6) {6x-3y=9 {-6x-30y=57 -33y=-48 / (-33) Y=48/33 X=-9,5- (5*48/33) X=-9,5-240/33 X=-9,5- 7 i 3/11 X=-16,5-3/11 = -16 i 5/22