please,,,di jawab???

Kelas 8 Matematika
Bab SPLDV

1]
2x + y = 6
x + y = 4
---------------- -
x = 2

x + y = 4
2 + y = 4
y = 4 - 2
y = 2

HP = { (2, 2) }

2]
2x + y = 7
3x - y = 8
---------------- +
5x = 15
x = 15/5
x = 3

2x + y = 7
2 . 3 + y = 7
y = 7 - 6
y = 1

2x + 3y
= 2 . 3 + 3 . 1
= 6 + 3
= 9

maaf ya klau salah

makasih