$\"\"$

The expression is “negative 117 is nine times a number”.

Let n represent the number.

The word “negative” can be represented as “ $\"\"$ ” symbol

The word “is” can be represented as “ = ” symbol.

The word “times” indicates multiplication and the symbol is “ $\"\"$ ”. $\"\"$

Rewrite the sentence into expression as \ \

$\"\"$

The equation is $\"\"$ $\"\"$

According to division property of equality:

For any number a, b and c, If a = b then $\"\"$

$\"\"$ (Divide each side by 9)

$\"\"$ (Cancel common factors)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

The number is $\"\"$