Jawaban:

1) 2x - 4y = 8 dan x + 3y =(-1)

x+3y=(-1)

x=(-1)-3y

subsitusi x=(-1)-3y ke 2x - 4y = 8

2x - 4y = 8

2(-1-3y)-4y=8

-2-6y-4y=8

-10y=10

y=-1

subsitusi y= (-1) ke x + 3y =(-1)

x+3y= (-1)

x+3(-1)=(-1)

x-3=(-1)

x=2

HP={2,1)

2) x + 2y = 11 dan y=4

subsitusi y=4 ke x + 2y = 11

x + 2y = 11

x+2(4)=11

x+8=11

x=3

HP={3,4}

3) 3x + 2y = 11 dan x + y = (-3)

x + y = (-3)

x=-3-y

subtitusi x=-3-y ke 3x + 2y = 11

3x + 2y = 11

3(-3 - y)+2y=11

-9-3y+2y=11

-y=20

y=-20

subsitusi y=-20 ke x + y = (-3)

x + y = (-3)

x-20=-3

x=17

hp=((-20),17)

4) x + 3y = 7 dan x=1

subsitusi x=1 ke x + 3y = 7

x + 3y = 7

1+3y=7

3y=6

y=2

HP={1,2)

5) 5x + 3y = -2 dan y=6

SUBSITUSI Y=6 KE 5x + 3y = -2

5x + 3y = -2

5X+3(6)=-2

5x+18= -2

5x=-20

x=-4

HP=((-4),6)

terimakasih banyak