Question

Resolva as inequações U=R

a) 8x - 10 > 2x + 8
b) 2 ( 3x+7) < -4x + 8
c) 20- ( 2x+ 5) < 11+ 8x
d) 2x+ 5 < -3x +40
e) 6 ( x-5) -2 ( 4x+ 2) > 100
f) 7x-9 > -2x+ 16
g) 2x+ 5> -3x + 40
h) 6 ( x-5) -2 ( 4x+2) > 80
i) 20- ( 7x + 4) < 30

Answer 1

Vamos lá.

8x-10>2x+8
8x-2x>8+10 6x>18
 x>18/6
    x>3   2(3x+7)<-4x+8
  6x+14<-4x+8
   6x+4x<8-14
    10x<-6
      x<-6/10   20 - (2x + 5) < 11 + 8x
20 - 2x - 5 <11 +8x
15 - 2x < 11 + 8x
- 2x - 8x < 11 -15
- 10x < - 4
x > 4/ 10
x > 2/ 5   2x+5 <-3x+40
2×+3×<40-5
5×<35 X<35/5
×<7   6x - 30 - 8x - 4 > 100
6x - 8x > 100 + 30 + 4
- 2x > 134 *(-1)
2x < - 134
x < - 134/2
x < - 67   7x-9 > -2x+ 16 7x+2x>16+9 9x>25 X> 25/9   2x+ 5> -3x + 40 2x + 3x > 40 – 5 5x >35 x>35/5 x>7   6 ( x-5) -2 ( 4x+2) > 80 6x-30 -8x-4>80 -2x > 80 + 4 + 30 -2x>114 (-1) 2x>-114 x>-114/2 x>57   20- ( 7x + 4) < 30 20-7x-4<30
-7x<30-16
-7x<14  .-1
x<-14/7
x<-2

Espero ter te ajudado.