1.himpunan penyelesaian dari y=2x-3 dan 3x+2y=8 adalah................... 2.diketahui sistem persamaan 2x-3y=18 dan x+4y= -2. nilai x+y adalah............
Takamori37
Y = 2x-3 3x+2y = 8 3x+2(2x-3) = 8 3x+4x-6 = 8 7x=14 x = 2 y = 2x-3 = 2.2-3 = 4-3 = 1 HP = {(x,y)|(2,1)}
3x+2y = 8
3x+2(2x-3) = 8
3x+4x-6 = 8
7x=14
x = 2
y = 2x-3 = 2.2-3 = 4-3 = 1
HP = {(x,y)|(2,1)}
2x-3y=18
x + 4y=-2 (x2)
2x - 3y = 18
2x + 8y = -4
--Kurangi--
-11y = 22
y = -2
2x-3y = 18
2x-3(-2) = 18
2x+6 = 18
2x = 12
x = 6
Sehingga,
x+y = 6+(-2) = 4
Kalo nanya mulu sekali-kali berterima kasih, biasakan.