Question

solve for x : -x - 9 <9

Answer 1

-x < 18
x > 18
.

Answer 2

look at the < as if it was a = sign

Answer 3

sorry i made an error in last step the answer is

x > -18

both sides had to be divided by -1 ( i didnt divide 18 by -1)

Answer 4

note when diviving by negative the inequality sign flips

Answer 5

we can easily check if >-18 is correct

plug in - 17:

-(-17) - 9 = 8 which is <9 - ok

-19:

-(-19) - 9 = 10 > 9 - ok