tolong dijawab ya... pakai sistem Eliminasi

3) 2x + y = 5 |×2
3x - 2y = 4
maka
4x + 2y = 10
3x - 2y = 4
------------------(+)
7x = 14
x = 2

2x + y = 5 |×3
3x - 2y = 4 |×2
maka
6x + 3y = 15
6x - 4y = 8
-------------------(-)
7y = 7
y = 1

hp = { 2 , 1 }

4) 3x - y = 2 |×2
6x - 2y = 4
maka
6x - 2y = 4
6x - 2y = 4
-----------------( - )
0
hp = { tdk ada penyelesaian }