Question

|y|=9
|x|=1,6
|y|=5 дробь 9
|x+7|=10
|y-2|=5
|y-1,7|=4

23 БАЛЛА

Answer 1

|y| = 9 ⇔ y = ±9.
|x| = 1.6 ⇔ x = ±1.6.
|y| = 5/9 ⇔ y = ± 5/9.
|x + 7| = 10 ⇔ x + 7 = ±10 ⇔ x = 3 или x = –17.
|y – 2| = 5 ⇔ y – 2 = ±5 ⇔ y = 7 или y = –3.
|y – 1.7| = 4 ⇔ y – 1.7 = ±4 ⇔ y = 5.7 или y = –2.3.