Write the inequality in interval notation.
x < 7
In interval notation, a square bracket is used to show that a number is included in the set and a parenthesis is used to indicate that a number is not included in the set.
The number 7 is not included in the set because the inequality sign is <.
To show that an interval includes all real numbers less than 7, use the symbol -∞. Recall that it does not represent an actual number.
The interval notation of the inequality is (-∞,7).