tolong tulis caranya dong

Mapel : Matematika

Kelas : 8

Bab : Persamaan Linear
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Gunakan Metode Subtitusi :
x - 3y = 12
x = 12 + 3y ________, (1)

Subtitusi nilai x :
2x + 5y = 2
2(12 + 3y) + 5y = 2
24 + 6y + 5y = 2
11y = 2 - 24
y = -22/11
y = -2

⏩Tentukan nilai x
x = 12 + 3y
x = 12 + 3(-2)
x = 12 - 6
x = 6

Maka,
= 2a - b
= 2(6) - (-2)
= 12 + 2
= 14 → Opsi D