Question

@hartnn am I doing this correctly?

3|y-9|<27
/3 /3
|y-9|<9
y-9<9 or y-9<-9
+9 +9 +9 +9
y<18 y<0

Answer 1

when |a| < b
-b < a <b

so in the sense ,
a<b and a>-b