Question

Помогите пожалуйста!!!!!

Answer 1

1)|x| + 4 = 9 ⇔ [ x + 4 = 9 [ x = 9 - 4 [ x = 5
[ x + 4 = (-9) ⇔ [ x = (-9) - 4 ⇔ [ x = (-13)

2)|y| - 4 = 7 ⇔ [ x - 4 = 7 [ x = 7 + 4 [ x = 11
[ x - 4 = (-7) ⇔ [ x = (-7) + 4 ⇔ [ x = (-3)

3)|x + 2| = 0 ⇔ x + 2 = 0 ⇔ x = 0 - 2 ⇔ x = (-2)
4)|x - 5| =0 ⇔ x - 5 = 0 ⇔ x = 0 + 5 ⇔ x = 5
5)|2x - 3| =0 ⇔ 2x - 3 = 0 ⇔ 2x = 0 + 3 ⇔ 2x = 3 ⇔ x = 3/2 ⇔ x = 1,5
6)|5x - 8| = 0 ⇔ 5x - 8 = 0 ⇔ 5x = 0 + 8 ⇔ 5x = 8 ⇔ x = 8/5 ⇔ x = 1,6