2x+b-1 =0
2x=1-b
x =(1-b)/2
2x-b-5 = 3b-x+4
3x =4b+9
x = 4b/3 +3
(1-b)/2 < 4b/3 + 3 *6
3-3b < 8b+18
11b>-15
b>-15/11
-3<2x-1<7<br>-2<2x<8<br>-1
ответ: 3≤x<4<br>
|2-|3-x|| = |3-x|-2
1)
2-|3-x| = -|3-x|+2 x∈R
2)
2-|3-x| = |3-x|-2
2|3-x|=4
|3-x|=2
3-x=2 3-x=-2
x= 1 x = 5