Question

Решение неравенства -9+10(-2x+9)<-7

Answer 1

-9+10(-2x+9)<-7
-9-20x+90<-7
-20x<-7+9-90
-20x<-88
x<$\frac{88}{20} = \frac{44}{10}= \frac{22}{5}=4,4$
x<4,4