Răspuns:
Explicație pas cu pas:
(5-2x)|(7x+2) |·2 ⇒ (5-2x)|(14x+4) (1)
(5-2x)|(5-2x) |·7 ⇒ (5-2x)|(35-14x) (2) Facem (1)+(2) ⇒ (5-2x)|39,
Deci 5-2x = -39, -13, -3, -1, 1, 3, 13, 39 |-5, ⇒
-2x = -44, -18, -8, -6, -4, -2, 8, 34 |:(-2) ⇒
x = 22, 9, 4, 3, 2, 1, -4, -17
Deci, x∈{-17,-4,1,2,3,4,9,22}