Question

Why do we use variables in math?

Answer 1

They are used for a number we don't know what is exactly. As we solve the problem, we learn what the number could be, but when we don't know a certain number or have to solve for the unknown number, we use a variable to substitute for it.

Explanation:

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Answer 2

We use it to substitute an unknown number. We have a variable for a number we don’t know and as we solve the problem we can find the answer for the variable or unknown number.

Explanation:

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