Question

Rezolvați în Z inecuatiile..
A) x-20<-18
B)3(x-5)>4x-3
C)2(5x-6)+4(x-8)<3(8x-5)+18

Answer 1

a.x>2 
b.x<-12
c. x>-47/10

Answer 2

A) => x < 2 => x € (1, 0 , -1 ...... )

B) => 3x - 15 > 4x - 3 => 3x - 4x < 15 - 3 => -x < 12 => x € ( -1 , -2 , -3 , -4....)

C) => 10x - 12 + 4x - 32 < 24x - 15 + 18 => 10x + 4x - 24x > 12 + 32 - 15 + 18 => -10x > 47 => x > 47 : (-10) => x > 4,7 => x € ( 5, 6, 7, 8,.... )