Question

Exerciutiul 9 va rog mult

Answer 1

9.a) 7x-10+2x-14<8x-8
9x-24<8x-8
9x-8x<-8+24
x<16
b) 2x+10-12x+6>10x-15
-10x+16>10x-15
-10x-10x>-15-16
-20x>-31/×(-1)
20x>31
x>31:20
x>1,55
c) 6x+9+6x+4<9x+34
12x+13<9x+34
12x-9x<34-13
3x<21
x<21:3
x<7
d) 5x-15-2x+2+3x>sau egal-1+7x
6x-13>-1+7x
6x-7x>-1+13
-x>12/×(-1)
x>-12
e) -3x+8-6x+12<sau egal-4x-20
-9x+20<-4x-20
-9x+4x<-20-20
-5x<-40/×(-1)
5x<40
x<40:5
x<8
f) 4x-4x-6>sau egal36-6x-12
0-6>24-6x
-6+6x>24
6x>24+6
6x>30
x>30:6
x>5
-x>12/×(-1)