Question

Решить уравнения: 1). │х│+ 3 = 9;
2). │х + 3│= 9;
3). │2х + 6│= 12;

Answer 1

Пошаговое объяснение:

$|x| + 3 = 9 \\ |x| = 9 - 3 \\ |x| = 6 \\ x = 6 \\ x = - 6 \\ |2x + 6| = 12 \\ 2x + 6 = 12 \\ 2x = 12 - 6 \\ 2x = 6 \\x = 3 \\ 2x + 6 = - 12 \\ 2x = - 12 - 6 \\ 2x = - 18 \\ x = - 9$

$|x + 3| = 9 \\ x + 3 = 9 \\ x = 6 \\ x + 3 = - 9 \\ x = - 12$