please bantuannya besok di kumpul

2y + 4x = 20 | ×3
3y + x = 15 | ×2

-> 6y + 12x = 60
6y + 2x = 30
dikurangi menjadi 10x = 30
x = 3
3y + x = 15
3y + 3 = 15
3y = 12
y = 4