Hdhdhdusjqjdijeufhdbcifbufu
-2 + 3 |x + 1| = 7
↪3 |x + 1| = 7 + 2
↪ 3 |x + 1| = 9
↪ |x + 1| = 9 : 3
↪ |x + 1| = 3
• Positif
x + 1 = 3
x = 3 – 1
x = 2
• Negatif
x + 1 = -3
x = -3 – 1
x = –4
Jadi, jawabannya D. {–4, 2}
Hdhdhdusjqjdijeufhdbcifbufu
-2 + 3 |x + 1| = 7
↪3 |x + 1| = 7 + 2
↪ 3 |x + 1| = 9
↪ |x + 1| = 9 : 3
↪ |x + 1| = 3
• Positif
x + 1 = 3
x = 3 – 1
x = 2
• Negatif
x + 1 = -3
x = -3 – 1
x = –4
Jadi, jawabannya D. {–4, 2}