Question

When writing a word sentence as an equation, explain when to use a variable.

Answer 1

Would be written as: x(3)=4
Since "a number" is not a specific number, it is to be written as a variable.

Answer 2

When there is one object that is not defined by a number. Ex: a number times three is equal to four.
Would be written as: x(3)=4
Since "a number" is not a specific number, it is to be written as a variable.