1. ptr. x ≥ 0 |x| = x 0 ≥ x ≥ 3 |x-3| = 3-x
2x = 3-x +2 3x = 5 x = 5/3
ptr. x-3 ≥ 0 x ≥ 3 |x| = x |x-3| = x-3
2x = x-3 + 2 x = - 1 < 3 ⇒ x∈Ф
ptr. x < 0 |x| = -x |x-3| = 3-x
-2x = 3-x + 2 x = - 5
2. 2+x ≥ 0 x ≥ -2 |2+x| = 2+x -2 ≤ x ≤ 3/5 |5x - 3| = 3 - 5x
2+ x = 3 - 5x 6x = 1 x = 1/6
ptr. 5x - 3 ≥ 0 x ≥ 3/5 |2+x| = 2+x |5x-3| = 5x - 3
2+x = 5x - 3 4x = 5 x = 5/4