Learning Experience - T4 W2

This week I learnt how to use Variables in math (Algebraaaaaaa). Variables are a changing number that can by represented by a letter or a symbol. 

For example:   

15 + t =20     t - 5

20 + y =40    y - 20

The number behind the symbol can change, such as:

2 + n = 7

4 - a = 2