Question

Am nevoie de ajutor
Multumesc

Answer 1

1.
4x-12+2≤6x+4-4
4x-10≤6x
4x-6x≤10
-2x≤10
-x≤5 =>x≥-5

2.
2(29-2x)+30<3(3x-11)+6x
58-4x+30<9x-33+6x
88-4x<15x-33
-4x-15x<-33-88
-19x<-121  l·(-1)
19x>121 =>x>121/19

3.
x²-2x-8-3≤5+12-7x+x²
x²-2x-11≤x²-7x+17
-2x-11≤-7x+17
-2x+7x≤11+17
5x≤28 =>x≤28/5

4.
2(6-x)+3≤6x-1
12-2x+3≤6x-1
15-2x≤6x-1
-2x-6x≤-15-1
-8x≤-16  l·(-1)
8x≥16 =>x≥2

5.
x²-9<x²-2x+1-2
-9<-2x-1  l·(-1)
9>2x+1
9-1>2x
8>2x =>x<4