Question

preciso imediatamente

A) 2(x-5)-3 ≥ 6x+3

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

Answer 1

A)2(x-5)-3≥ 6x+3
2x-10-3≥6x+3
2x-6x≥3+10+3
-4x≥16  (-1)
4x≤-16
x≤-16/4
x≤-4
S={xER/x≤-4}

B)2(3x+7)<-4x+8
6x+14<-4x+8
6x+4x<8-14
10x<-6
x<-6/10
x<0,6
S={xER/x<0,6}