Question

Need help show steps|7-2x|<9

Answer 1

-9<7-2x<9

(7-2x) < 9
7-2x<9
-2x<2
x >1

7-2x > -9
-2x > -16
x < 8

so together
1<x<8

whenever you have |x|<a
you take -a<x<a
whenever you have |x|>a
you take x>a and x<-a

Answer 2

so you subtract the 9 from both sides

Answer 3

how do you write it in interval notation?

Answer 4

(1,8) ?

Answer 5

yes, you dont use brackets?

Answer 6

[ ] ? or { } ?

Answer 7

yes, but which one? ( ) or Brackets Im asking cause they want it in interval notation