Kerjakan dalam 3 cara:grafik,substisusi dan eliminasi soal kelas 1.2x+3y=5 4x-y=5 2.y=x-4 y=4x-10 3.2x+10y=14 5x-9y

cara eliminasi :

1) 2x + 3y = 5 |×2
4x - y = 5
maka
4x + 6y = 10
4x - y = 5
-------------------(-)
7y = 5
y = 5/7
• 2x + 3y = 5
4x - y = 5 |×3
maka
2x + 3y = 5
12x - 3y = 15
------------------(+)
14x = 20
x = 20/14
x = 10/7
hp = ( 10/7 , 5/7 )

2) y = x - 4
y - x = - 4 ... pers 1
y = 4x - 10
y - 4x = - 10 ... pers 2
pers 1 & 2 dieliminasi
y - x = - 4
y - 4x = - 10
-----------------(-)
3x = 6
x = 2
• y - x = - 4 |×4
y - 4x = - 10
maka
4y - 4x = - 16
y - 4x = - 10
-------------------(-)
3y = - 6
y = - 2
hp = ( 2 , - 2 )