Tentukan NP 2x+5y = -1 3x-2y =8 dengan a.grafik b.elimnasi

2x+5y=-1
3x-2y=8

m. eliminasi
elim.x
2x+5y=-1 |×3 => 6x+15y=-3
3x-2y=8 |×2 => 6x-4y=16

6x+15y=-3
6x-4y=16
________-
19y=-19
y=-1

elim.y
2x+5y=-1 |×2 =>4x+10y=-2
3x-2y=8 |×5 =>15x-10y=40

4x+10y=-2
15x-10y=40
_________+
19x=38
x=2

hp={2,-1}

m. grafik
2x+5y=-1
3x-2y=8

• 2x+5y=-1
x=2
2(2)+5y=-1
4+5y=-1
5y=-1-4
5y=-5
y=-1
(2,-1)

x=-3
2(-3)+5y=-1
-6+5y=-1
5y=-1+6
5y=5
y=1
(-3,1)

• 3x-2y=8
x=2
3(2)-2y=8
6-2y=8
-2y=8-6
-2y=2
y=-1
(2,-1)

x=0
3(0)-2y=8
-2y=8
y=-4
(0,-4)

hp={2,-1}