No 30 caranya gimana?

Bab Persamaan Garis
Matematika SMP Kelas VIII

5x + 1y = 6
2x + 1y = 3
---------------- -
3x = 3
x = 3 : 3
x = 1

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

maka, x = y = 1

◎◎ A ◎◎