Tentukan Himpunan penyelesaian 2x-3y=-6 3y-2x=18 tolong sekarang besok di setor

2x-3y=-6
-2x+3y=18
_________ -
4x=12
x=3

2x-3y=-6
2(3)-3y=-6
6-3y=-6
-3y=-6-6
-3y=-12
y=4

Bab : Persamaan Linear Dua Variabel
Kelas : VII SMP

2x - 3y = -6 .... 1) => 2x = -6 + 3y => x = -6 + 3y / 2
3y - 2x = 18 .... 2)

3y - 2x = 18
3y - 2(-6+3y / 2) = 18
3y + 12 - 3y / 2 = 18
6y/2 + 12 - 3y / 2 = 18
6y + 12 - 3y / 2 = 18
3y + 12 / 2 = 18
3y + 12 = 36
3y = 36 - 12
3y = 24
y = 24/3
y = 8

Subs . nilai y ke pers 1 !

2x - 3y = -6
2x - 3(8) = -6
2x - 24 = -6
2x = -6 + 24
2x = 18
x = 18/2
x = 9


Hp = { 9 , 8 }