Bantu ka tolong bgtt ya
Jawab:
Penjelasan dengan langkah-langkah:
2x + 3y = -19 ⇒ ×2 ⇒ 4x + 6y = -38
4x – y = 53 ⇒ ×1 ⇒ 4x – y = 53
____________ _
7y = -91
y = -13
subtitusikann
2x + 3y = -19 Ditanya : nilai 2x + y = 2x + y
2x + 3(-13) = -19 = 2(10) + -13
2x + -39 = -19 = 20 + -13
2x = -19 + 39 = 7
2x = 20
x = 10