7
(2y + 3)/4 принадлежит (-4 5)
-4 < (2y + 3)/4 < 5
-16 < 2y + 3 < 20
-19 < 2y < 17
-19/2 < y < 17/2
y ∈ (-19/2, 17/2)
8
|2x + 5| ≤ 15
-15 ≤ 2x + 5 ≤ 15
-20 ≤ 2x ≤ 10
-10 ≤ x ≤ 5
x ∈ [-10, 5]
sin0,7 > sin4
(0.6) (-0,7)
cos1.3 >cos2.3
(0.2) (-0.6)