Question

1. Resolva as inequações, sendo x um núme-
ro racional
a) 3(x - 1) < 5 - 2x

b) 2 + 2x < 6(x - 5)

c) 5x - 2(x - 1) > 7 - 4x​

Answer 1

Resposta:

A) 3 (x- 1)<5-2x

3x-3<5-2x

3x+2x<5+3

5x<8

x<8/5

x<1,6

B) 2+ 2x < 6(x -5)

2+ 2x-6x<-30

2X-6x<-30-2

4x<-32

x<-32/4

x<-8

C) 5x -2(x-1)>7-4x

5x-2x-2>7-4x

5x-2x+4x>7+2

7x>9

x>9/7

x>1,28 ...