Question

1.Решите неравенства А) 2(х+3)<3-х
Б)1.4х-3⩾2(0.5х-2.6)

Answer 1

2(х+3)<3-х

2х+6<3-x

2x+x<3-6

3x<-3

x<-1      x∈(-∞;-1)

1.4х-3⩾2(0.5х-2.6)

1.4x-3≥x-5.2

1.4x-x≥-5.2+3

0.4x≥-2.2

x≥-5.5       x∈[-5.5;+∞)