Question

PoRRRRrrr FAVORRRR FRIENDSsss ME AJUDAAAAA COM ESSAS INEQUAÇOES U=Z

a) 2×+5<-3×+40

b) 6(×-5)-2(4×+2)>80

c) 20-(7×+4)<30​

Answer 1

A: 2x +5<-3x +40

2x +3x< 40-5

5x<35

x<35/5

x< 7

B: 6(x-5) -2(4x+2)>80

6x -30 -8x - 4>80

-2x > 80 +34

-2x> 114 ( -1)

2x< - 114

x< -114/2

x< - 57

C: 20 -(7x + 4) <30

20 -7x -4 < 30

-7x< 30 -16

-7x< 14 ( -1)

7x> -14

x> -14/7

x> -2