Question

Resolva as inequações a seguir:
A) 2x-18<4x-38
B) 2x+5≤-3x+40
C) 2(3x+7)<-4x+8

Answer 1

Olá


A) 2x-18<4x-38

2x - 4x < -38 + 18

-2x < -20     *(-1)

2x > 20

x > 20/2

x > 10



B) 2x+5≤-3x+40

2x + 3x ≤ 40 - 5

5x ≤ 35

x ≤ 35/5

x ≤ 7



C) 2(3x+7)<-4x+8

6x + 14 < -4x + 8

6x + 4x < 8 - 14

10x < -6

x < -6/10

x < $-\dfrac{3}{5}$