Suppose we want to solve

⎕ − 3 = 5

We have to find the
**
missing number
**

In algebra,

We don’t write boxes

It has a
**
variable
**
− x

We write letters, like 𝑥

It has a variable − x

But, why write 𝑥? Why not boxes ?

- Writing x is easier to write than ⎕
- if there are two boxes, now do you tell which box is which ?

So let’s start ?