Question

1- resolva as inequações u=r
A) 8x-10>2x+8
B) 2(3x+7)<-4x+8
C)20-(2x+5)<11+8x

Answer 1

a) 8x-10>2x+8
8x-2x>8+10
6x>18
x>18/6
x>3

b) 2.(3x+7)<-4x+8
6x+14<-4x+8
10x<-6
x<-2/5

c) 20-(2x+5)<11+8x
20-2x-5<11+8x
-10x<11+5-20
-10x<-5
x<1/2