A) |3х-13| = 33x - 13 = 3 or 3x - 13 = -33x = 16 or 3x = 10x = 16/3 or x = 10/3
B) |x-4| = 2x - 4 = 2 or x - 4 = -2x = 6 or x = 2
C) |21x + 1| = 2021x + 1 = 20 or 21x + 1 = -2021x = 19 or 21x = -21x = 19/21 or x = -1
D) |2x - 1| = 32x - 1 = 3 or 2x - 1 = -32x = 4 or 2x = -2x = 2 or x = -1
A) |3х-13| = 3
3x - 13 = 3 or 3x - 13 = -3
3x = 16 or 3x = 10
x = 16/3 or x = 10/3
B) |x-4| = 2
x - 4 = 2 or x - 4 = -2
x = 6 or x = 2
C) |21x + 1| = 20
21x + 1 = 20 or 21x + 1 = -20
21x = 19 or 21x = -21
x = 19/21 or x = -1
D) |2x - 1| = 3
2x - 1 = 3 or 2x - 1 = -3
2x = 4 or 2x = -2
x = 2 or x = -1