Question

resolva em R as inequações
a) 3x < x +2 < -X +5
b)-2x < igual 1-x < igual -3x +3
c)2x < igual -x +9< igual 5 + 21

Answer 1

3x<x+2+x-5 = 3x<2x-3 =3x-2x<-3 = x<-3

-2x<=1-x<=-3x+3 = -2x<=1-x+3x-3= -2x<=2x-2 = -2x-2x<=-2 = -4x<=-2(-2)
2x<=1 =  x<=1/2