Question

Решите неравенство: 2+х>8-x.    2x+1>x+6.     6x+1<2x+9

Answer 1

2+х>8-x

2+x-8+x<0

2x-6<0

2x>6

x<3

 

2x+1>x+6

2x+1-x-6<0

x-5<0

x>5

 

6x+1<2x+9

6x+1-2x+9>0

4x+10>0

4x<-10

x<-2,5