Question

How do you solve `27 > x+18`?

Answer 1

When given an inequality the following operations are permitted without modifying the orientation of the inequality:

• add or subtract any value to/from both sides
• multiply or divide by any value greater than zero

`27>x+18`
subtracting `18` from both sides gives
`9>x`

(If you like you could write this as `x<9`)