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a. kasus 1:
2x - 3 = 11
2x = 14
x = 7
kasus 2:
2x - 3 = -11
2x = -8
x = -4

b. 3|4x-8| - 24 = 12
12|x-2| = 26
|x-2| = 3
kasus 1:
x - 2 = 3
x = 5
kasus 2:
x - 2 = -3
x = -1

c. (3x - 5)² < (2x + 20)²
9x² - 30x  + 25 < 4x² + 80x + 400
5x² - 110x - 375 < 0
x² - 22x - 75 < 0
(x - 25)(x + 3) < 0
-3 < x < 25